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U

555 words

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  1. unfamiliar adjective
    1) Unfamiliar means not known to you or not seen before. 2) «Unfamiliar with something» means you do not know much about it.
  2. unfasten verb (unfasten, unfastens, unfastened, unfastening)
    To unfasten something means to open it or undo it, such as a button, buckle, belt, seat belt, clasp or lock.
  3. unfastened adjective (unfastened); also past form of the verb unfasten (unfasten, unfastens, unfastened, unfastening)
    Unfastened means not fastened, not closed or done up: an unfastened seat belt, an unfastened gate.
  4. unfathomable adjective
    Too deep or too hard to measure or understand.
  5. unfavourable adjective (unfavourable; US unfavorable)
    Not good or helpful; making success less likely: unfavourable weather.
  6. unfed adjective
    Not given food; hungry.
  7. unfeeling adjective (unfeeling)
    1) Not kind; not caring about other people's feelings or pain; hard-hearted. 2) (rare) Not able to feel anything physically, numb.
  8. unfeigned adjective (formal)
    Real and genuine; not pretended.
  9. unfertilised adjective (unfertilised; US spelling: unfertilized)
    Unfertilised describes an egg or egg cell that has not joined with a sperm cell, so it cannot grow into a baby animal.
  10. unfinished adjective (unfinished)
    Unfinished means not finished, not complete yet.
  11. unfit adjective (unfit, more unfit, unfittest — rare)
    Not healthy or strong in the body, usually because of too little exercise.
  12. unflattering adjective (unflattering)
    Unflattering means making someone or something look or seem worse than they really are, like an unflattering photo.
  13. unfledged adjective
    1) Of a young bird, not yet grown its feathers, so it cannot fly yet. 2) (figurative) young and not yet experienced.
  14. unfold verb (unfold, unfolds, unfolded, unfolding)
    To open something that was folded so it lies flat or spreads out.
  15. unfollow verb (unfollow, unfollows, unfollowed, unfollowing)
    1) (online) To stop following a person or account on social media, so you no longer see their posts.
  16. unforced adjective
    Unforced means done naturally and easily, not with effort or pretending.
  17. unforeseen adjective (unforeseen)
    1) Not expected or planned for; something nobody guessed would happen.
  18. unforgettable adjective (unforgettable)
    1) Unforgettable means so special, exciting, beautiful or strange that you will remember it for a very long time.
  19. unforgiving adjective (unforgiving; more unforgiving, most unforgiving)
    An unforgiving person does not forgive people easily and keeps blaming them for wrongs they did.
  20. unfortunate adjective (unfortunate); noun (an unfortunate, unfortunates — formal, old-fashioned); adverb unfortunately
    1) Having bad luck; unlucky. 2) Causing problems or sad results: an unfortunate accident. 3) (formal) Not suitable and a bit embarrassing…
  21. unfortunately adverb
    Used to say that something is sad, bad or unlucky, or that it did not turn out well: «Unfortunately, it started to rain.»
  22. unfounded adjective
    1) Unfounded means not based on facts or evidence; not true.
  23. unfree adjective (unfree)
    Unfree means not free; not allowed to choose how you live, work or move, such as a slave, a serf or a prisoner.
  24. unfriendly adjective (unfriendly, unfriendlier or more unfriendly, unfriendliest or most unfriendly)
    Unfriendly means not kind or welcoming, not wanting to be nice to other people.
  25. unfrozen adjective (unfrozen); past participle of «unfreeze» (unfreeze, unfreezes, unfroze, unfrozen, unfreezing)
    Unfrozen means no longer frozen; thawed, or never frozen at all.
  26. unfulfilled adjective
    1) Not carried out or finished, as a promise or task is not done. 2) Not satisfied, with a wish or need still missing.
  27. unglazed adjective (unglazed)
    Unglazed pottery or tiles have no shiny glassy coating (glaze) on the surface, so they look dull and feel rough.
  28. ungodly adjective
    1) (old use) Not respecting God; wicked or sinful. 2) (informal) Very early or very late, or very unpleasant: «an ungodly hour».
  29. ungovernable adjective (ungovernable)
    Ungovernable means impossible to control or rule, like an ungovernable country, crowd or class.
  30. ungracious adjective
    Rude or not polite; not kind in the way someone speaks or behaves.
  31. ungrammatical adjective (ungrammatical)
    1) Ungrammatical means not following the rules of grammar of a language, like «She go to school yesterday.»
  32. ungrateful adjective
    1) Ungrateful means not thankful, not showing thanks when someone has helped you or given you something.
  33. unguarded adjective
    Unguarded means not watched or protected by anyone.
  34. unguent noun (plural unguents)
    (old use) A soft cream or oil rubbed on the skin to heal it, soften it or make it smell nice.
  35. unhappily adverb
    1) In a sad way, showing you are unhappy. 2) Unluckily; sadly, as a pity.
  36. unhappiness noun (unhappiness — uncountable)
    1) Unhappiness is the feeling of being sad or not happy.
  37. unhappy adjective (unhappy, unhappier, unhappiest; also more unhappy, most unhappy); noun form: unhappiness
    1) Sad, not happy or cheerful. 2) Not pleased or not satisfied with something (unhappy with a mark). 3) Unlucky or unfortunate, as in an…
  38. unharmed adjective (unharmed)
    1) Not hurt or damaged; safe after a danger.
  39. unharness verb (unharness, unharnesses, unharnessed, unharnessing)
    To take the harness off an animal, such as a horse, so it can rest or graze.
  40. unhealthy adjective (unhealthy, unhealthier, unhealthiest, or more/most unhealthy)
    1) Not good for your health: "unhealthy food". 2) Not well, or looking ill: "an unhealthy plant". 3) Not good or normal: "an unhealthy…
  41. unheard adjective (unheard)
    1) Unheard means not heard by anyone, or not listened to. 2) Unheard of (phrase) means never known or done before, very unusual.
  42. unheated adjective (unheated)
    1) Unheated means without any heating, so it stays cold, like an unheated room, pool or greenhouse.
  43. unheeded adjective
    Not noticed or not paid attention to; ignored.
  44. unhelpful adjective
    1) Unhelpful means not helping, or making a problem or a situation harder.
  45. unhindered adjective
    Not blocked, slowed or stopped; free to go on.
  46. unhinge verb (unhinge, unhinges, unhinged, unhinging); adjective (unhinged)
    1) To take a door or lid off its hinges. 2) To upset someone so much that they stop thinking clearly or calmly. 3) (informal) «Unhinged»…
  47. unhinged adjective (unhinged); verb (unhinge, unhinges, unhinged, unhinging)
    Unhinged means mentally unbalanced, acting in a wild, crazy or frightening way.
  48. unholy adjective
    1) Wicked or sinful, not holy. 2) (informal) Very bad or great: «an unholy mess».
  49. unhook verb (unhook, unhooks, unhooked, unhooking)
    To unhook something is to undo it from a hook or take a hook out of it, such as unhooking a fish or a coat.
  50. unhorse verb (unhorse, unhorses, unhorsed, unhorsing)
    (old use) To knock or throw a rider off a horse.
  51. unhurt adjective (unhurt; usually after a verb)
    1) Unhurt means not injured or harmed, especially after an accident or danger.
  52. unhygienic adjective (unhygienic)
    1) Unhygienic means dirty in a way that can spread germs and illness.
  53. unicef proper noun (UNICEF — an organization)
    1) UNICEF is the part of the United Nations that works to help children around the world, giving them food, clean water, vaccines…
  54. unicorn noun (a unicorn, unicorns)
    A unicorn is a magical animal from stories and legends that looks like a white horse with one long, straight, twisted horn on its forehead.
  55. unicycle noun (a unicycle, unicycles); verb (unicycle, rare)
    1) A cycle with only one wheel, pedals and a seat, ridden by balancing, often by clowns or performers.
  56. unidentified adjective (unidentified)
    Unidentified means not known or not recognised: no one knows yet who or what it is.
  57. unification noun (unification)
    1) Unification is the act of joining separate things, groups or countries into one whole.
  58. unified adjective (unified); past form of the verb unify (unify, unifies, unified, unifying)
    1) Unified means joined together into one whole. 2) It also means made the same or consistent everywhere, as in a unified system.
  59. uniform noun (a uniform, uniforms); adjective (uniform — the same everywhere)
    1) A set of special clothes that everyone in a school, team or job wears, so they look the same or can be recognised, like a school…
  60. uniformly adverb (uniformly)
    1) In the same way everywhere or for everyone; evenly, without changes. 2) (maths, science) At the same rate all the time: moving uniformly.
  61. unimaginably adverb (unimaginably)
    1) Unimaginably means to a degree that is so great, small or extreme that it is very hard or impossible to imagine.
  62. unimpeded adjective (unimpeded); adverb use (move unimpeded)
    Unimpeded means not blocked or slowed down; free to move or happen: «an unimpeded view».
  63. unimportant adjective
    1) Unimportant means not important; not mattering much.
  64. unimpressed adjective (unimpressed; usually after a verb: be/look/seem unimpressed)
    Unimpressed means not thinking that someone or something is good, special or clever.
  65. uninformative adjective (uninformative)
    1) Uninformative means giving little or no useful information.
  66. uninformed adjective (uninformed)
    Uninformed means not knowing the facts about something: «an uninformed guess».
  67. uninhabited adjective (uninhabited)
    1) With no people living there. 2) With no animals or living things living there (less common).
  68. uninjured adjective (uninjured)
    1) Not hurt or harmed; without any injury.
  69. unintelligent adjective (unintelligent)
    1) Not clever; not showing good thinking or understanding. 2) (of a choice or action) Not sensible.
  70. unintelligibility noun (unintelligibility — uncountable)
    Unintelligibility is the state of being impossible or very hard to understand, especially speech or writing that cannot be made out.
  71. unintelligible adjective (unintelligible)
    Unintelligible speech or writing cannot be understood because it is unclear, mumbled, too messy, or in a code or language you do not know.
  72. unintended adjective (unintended); adverb unintendedly (rare)
    1) Unintended means not planned or not meant to happen: an unintended result, unintended harm.
  73. unintentional adjective (unintentional); adverb «unintentionally»
    1) Not done on purpose; accidental.
  74. unintentionally adverb (unintentionally)
    1) If you do something unintentionally, you do it by accident, not on purpose.
  75. uninterested adjective
    1) Uninterested means not interested; not wanting to know about or pay attention to something.
  76. uninteresting adjective (uninteresting)
    1) Uninteresting means not interesting; dull and boring, so it does not hold your attention.
  77. uninterrupted adjective (uninterrupted)
    1) Uninterrupted means going on without being stopped or broken. 2) An uninterrupted view is one that nothing blocks.
  78. uninvited adjective; adverb
    1) Uninvited means not invited; coming or happening without being asked.
  79. union noun (a union, unions; union, uncountable)
    A union is a group of workers who join together to protect their pay and rights (a trade union, a labor union).
  80. unique adjective (unique; usually not «more unique»)
    Unique means being the only one of its kind, unlike anything else: every snowflake is unique.
  81. uniquely adverb (uniquely)
    Uniquely means in a way that is the only one of its kind, so nothing else is like it.
  82. unison noun (no plural; used in the phrase «in unison»)
    «In unison» means all together, at the same time, with everyone doing the same thing.
  83. unit noun (unit, units)
    A unit is an amount used for measuring, like a meter, a kilogram, a liter or an hour.
  84. unite verb (unite, unites, united, uniting)
    To unite means to join together to make one group or one thing: «The two clubs united.».
  85. unity noun (unity; plural unities is rare)
    Being joined together as one, or people agreeing and working together.
  86. universal adjective (universal); noun (a universal — formal, philosophy)
    Universal means true for, done by or belonging to everyone or everything, in every place.
  87. universally adverb
    1) Universally means by everyone or everywhere, without exception. 2) Universally also means true or used in all cases.
  88. universe noun (the universe; a universe, universes)
    The universe is everything that exists: all of space, time, matter and energy, including all the stars, planets and galaxies.
  89. university noun (a university, universities)
    A place of higher learning where people study for degrees after school and where research is done.
  90. unjust adjective (unjust; more unjust, most unjust)
    Unjust means not fair or not right, especially when someone is treated badly without a good reason.
  91. unjustified adjective
    1) Unjustified means not fair or not reasonable; without a good reason.
  92. unjustly adverb (unjustly)
    1) If someone is treated unjustly, they are treated unfairly, in a way that is not right.
  93. unkempt adjective (unkempt)
    1) Unkempt means messy or untidy, not neatly cared for, especially of hair, beards or clothes.
  94. unkind adjective (unkind, unkinder, unkindest; more unkind)
    1) Unkind means not kind; saying or doing things that hurt or upset other people.
  95. unkindly adverb
    1) Unkindly means in a way that is not kind, not caring or a bit cruel.
  96. unkindness noun (unkindness — uncountable; an unkindness, unkindnesses)
    1) Unkindness is being unkind, mean or cruel to others. 2) An unkindness is one unkind act or word.
  97. unknowable adjective (unknowable)
    1) Unknowable means impossible to know or find out, even with study or tools.
  98. unknowing adjective (unknowing)
    Unknowing means not knowing or not aware of what is happening, often of something important.
  99. unknown adjective, noun (unknown, unknowns)
    1) Unknown means not known: an unknown number. 2) Unknown means not famous: an unknown singer. 3) In maths the unknown is the number you…
  100. unlabelled adjective (unlabelled; US unlabeled)
    1) Without a label: an unlabelled jar or bottle. 2) Not named or marked, like an unlabelled diagram.

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