cracked
uk
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/krækt/us
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/krækt/ adjective silly, stupid, or slightly mentally ill
crackers
uk
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/ˈkræk.əz/us
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/ˈkræk.ɚz/ adjective UK informal silly, stupid, or slightly mentally ill
crazed
uk
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/kreɪzd/us
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/kreɪzd/ adjective behaving in a wild or strange way, especially because of strong emotions or extreme pain: a crazed expression 狂野的表情
crazy
uk
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/ˈkreɪ.zi/us
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/ˈkreɪ.zi/ adjective mentally ill: I seriously think she'll go crazy if she doesn't have a holiday soon. 我真的认为她要是不马上休假的话会发疯的。
deranged
uk
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/dɪˈreɪndʒd/us
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/dɪˈreɪndʒd/ adjective completely unable to think clearly or behave in a controlled way, especially because of mental illness: a deranged criminal/mind/personality 疯狂的罪犯／混乱的头脑／狂躁的人格
lunatic
uk
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/ˈluː.nə.tɪk/us
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/ˈluː.nə.tɪk/ adjective silly in a dangerous way
nutty
uk
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/ˈnʌt.i/us
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/ˈnʌt̬.i/ adjective informal crazy, silly, or strange: She's got some nutty idea about setting up a school for cats. 她有了个怪异的念头，想创办一所猫咪学校。
swivel-eyed
uk
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/ˈswɪv.əlˌaɪd/us
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/ˈswɪv.əlˌaɪd/ adjective informal UK an insulting way to describe someone as crazy or as having very extreme ideas: The press has characterized him as a swivel-eyed fanatic. 媒体把他描述成一个极端狂热分子。
insane
uk
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/ɪnˈseɪn/us
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/ɪnˈseɪn/ C1 adjective extremely unreasonable or stupid: It would be insane not to take advantage of this opportunity. 如果不抓住这一机会的话那就太荒唐了。
barking
uk
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/ˈbɑː.kɪŋ/us
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/ˈbɑːr.kɪŋ/ adjective UK old-fashioned informal crazy or extremely silly: She must have been barking mad to lend him so much money. 借给他那么多钱，她一定是疯了。
cray
uk
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/kreɪ/us
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/kreɪ/ adjective slang a short form of "crazy" used by some young people: This is cray. 这太疯狂了吧。
loco
uk
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/ˈləʊ.kəʊ/us
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/ˈloʊ.koʊ/ adjective mainly US slang crazy: Man, he just went loco and smashed the place up. 好家伙，他发疯似的把这个地方砸了个稀巴烂。
screwball
uk
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/ˈskruː.bɔːl/us
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/ˈskruː.bɑːl/ adjective mainly US used to describe a type of film in which there are funny characters and silly situations: a screwball comedy 神经喜剧
wild
uk
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/waɪld/us
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/waɪld/ B2 adjective uncontrolled, violent, or extreme: a wild party 狂野的聚会
desperate
uk
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/ˈdes.pər.ət/us
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/ˈdes.pɚ.ət/ adjective willing to be violent, and therefore dangerous: This man is desperate and should not be approached since he may have a gun. 此人已是亡命之徒，可能还有枪，千万不要靠近。
frenzied
uk
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/ˈfren.ziːd/us
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/ˈfren.ziːd/ adjective uncontrolled and excited, sometimes violent: The office was a scene of frenzied activity this morning. 今天上午办公室里乱哄哄的。
madding
uk
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/ˈmæd.ɪŋ/us
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/ˈmæd.ɪŋ/ adjective mainly literary behaving in a wild and crazy way, especially in a way that makes people angry: This pretty town has not been destroyed by madding hordes of tourists. 这个美丽的小镇并没有被蜂拥而至的疯狂游客所破坏。
demented
uk
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/dɪˈmen.tɪd/us
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/dɪˈmen.t̬ɪd/ adjective unable to think or act clearly because you are extremely worried, angry, or excited by something: She was nearly demented with worry when her son didn't come home. 当儿子没有回家时，她几乎要急疯了。
possessed
uk
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/pəˈzest/us
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/pəˈzest/ adjective Someone who is possessed is thought to be controlled by an evil spirit.
squirrelly
uk
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/ˈskwɪr.əl.i/us
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/ˈskwɝː.li/ adjective US informal nervous and unable to stay still and calm: I could tell right away that the girls were squirrelly and unusually frantic. 我马上就能看出来，这些女孩子无法保持安静，而且异常疯狂。