(1) an unfriendly atmosphere (2) There's no need to be so unfriendly towards them. (3) the use of environmentally unfriendly products (= that harm the environment)
(1) Have you looked under the bed? (2) She placed the ladder under (= just lower than) the window. (3) The dog squeezed under the gate and ran into the road.
(1) The committee has little or no understanding of the problem. (2) The existence of God is beyond human understanding (= humans cannot know whether God exists or not) . (3) We finally came to an understanding about what hours we would work.
(1) I put up my umbrella. (2) colourful beach umbrellas (3) Many previously separate groups are now operating under the umbrella of a single authority.
umbrella [ʌmˈbrelə] 📢 UK📢 US
交换；
n.雨伞；〈比喻〉保护物；[军]空中掩护幕；总括；
n.浴室；盥洗室；（带抽水马桶的）厕所；卫生间；
adv.整洁地；干净地；灵巧地；恰好地；
(1) uncontrolled anger (2) The thoughts rushed into my mind uncontrolled. (3) the uncontrolled growth of cities
(1) There was a lot of unhappiness in my adolescence. (2) His laugh-a-minute image is just a front to hide his deep unhappiness. (3) He had sensed his mother's unhappiness.
(1) an area of high/low unemployment (2) rising/falling unemployment (3) It was a time of mass unemployment .
unemployment [ˌʌnɪmˈplɔɪmənt] 📢 UK📢 US
vt.印；给…以深刻印象；使铭记； n.印象；印记；
adj.有效的；起作用的；实际的，实在的；给人深刻印象； n.[军]现役兵额，有生力量，精兵；
n.失业；失业率；失业状况；失业人数；
n.旅行，旅程行期；历程，过程； vi.旅行，出游； vt.在…旅行或旅行到过…；
(1) He lay there, unable to move. (2) I tried to contact him but was unable to. (3) The military may feel unable to hand over power to a civilian President next year...
(1) Such behaviour is totally unacceptable in a civilized society. (2) Noise from the factory has reached an unacceptable level. (3) unacceptably high levels of unemployment
(1) a technical/legal/scientific, etc. term (2) a term of abuse (3) ‘Register ’ is the term commonly used to describe different levels of formality in language.
(1) He unfairly blamed Frances for the failure. (2) He had unfairly presented a caricature of my views. (3) Workers who have been unfairly dismissed may claim compensation.
unfairly [ʌnˈfeəlɪ] 📢 UK📢 US
adj.不幸的，悲惨的；不快乐的；不恰当的；不凑巧的；
不得不，只好；只得；必须；不得已；
adv.不公平地，不公正地；不正当地；
vt.规定；使明确；精确地解释；画出…的线条； vi.（给词、短语等）下定义，构成释义；
(1) He was unfortunate to lose in the final round. (2) It was an unfortunate accident. (3) She described the decision as ‘unfortunate ’.
unfortunate [ʌnˈfɔ:tʃənət] 📢 UK📢 US
adj.不幸的，倒霉的；不吉利的；不成功的；可惜的，可叹的； n.不幸的人；
adj.仔细的，小心的；周到的；慎；心细；
n.报考者；申请求职者；攻读学位者；最后命运或结局如何已显然可见者；
n.电力；电流，静电；高涨的情绪；紧张；
(1) She was knocked unconscious . (2) They found him lying unconscious on the floor. (3) unconscious desires
(1) The desire to be a mother may creep up on you unexpectedly. (2) Miserable, and unexpectedly lonely, she went in search of Jean-Paul. (3) She panics when people pop in unexpectedly, rushing round plumping cushions.
(1) I must write and thank Mary for the present. (2) There's no need to thank me─I enjoyed doing it. (3) In his speech, he thanked everyone for all their hard work.
thank [θæŋk] 📢 UK📢 US
vt.谢谢，感谢；责怪，把…归于； n.感谢，谢谢，道谢的话；
n.画家，着色者；油漆匠；（系船的）缆绳；破诡计；
n.<生>细胞；小牢房；电池；<诗>墓穴； vi.住在牢房或小室中； vt.囚禁；
adv.奇怪地，古怪地；奇妙地；额外地，附加地；零碎地，单数地； oddly enough的变体；
(1) The coin rolled underneath the piano. (2) This jacket's too big, even with a sweater underneath. (3) underneath her cool exterior she was really very frightened.
(1) unfortunately, I won't be able to attend the meeting. (2) I can't make it, unfortunately. (3) unfortunately for him, the police had been informed and were waiting outside.
unfortunately [ʌnˈfɔ:tʃənətli] 📢 UK📢 US
n.暴力，强暴，暴虐；猛烈，激烈；歪曲（事实），曲解（意义）；冒渎，不敬；
prep.到…之上；对…了解；[数]映射到…上； adj.映射的；自身的；映成的；
adv.不幸地，遗憾地；可惜；不巧；
n.倾向，趋势；（话或作品等的）旨趣，意向；性情；癖好；
(1) unimportant details (2) relatively/comparatively unimportant (3) They dismissed the problem as unimportant.
unimportant [ˌʌnɪmˈpɔ:tnt] 📢 UK📢 US
n.科学家；科学工作者；
adj.不重要的；琐细的；平凡的；不要紧；
adj.慷慨的，大方的；丰盛的；肥沃的；浓厚的；
adj.不重要的；琐细的；平凡的；不要紧；
(1) to undo a button/knot/zip, etc. (2) to undo a jacket/shirt, etc. (3) I undid the package and took out the books.