名詞 idiot:

1. a person of subnormal intelligence
   同義詞：imbecile, cretin, moron, changeling, half-wit, retard

1. He's a ruddy idiot.
   他是個(gè)大傻瓜。
2. Don't treat me as (if I were) an idiot.
   別把我當(dāng)傻瓜。
3. I feel such an idiot.
   我覺得自己簡(jiǎn)直是個(gè)傻瓜。
4. She always makes a mess of things; she's a prize idiot.
   她總是把事情弄糟; 她是個(gè)不折不扣的大笨蛋。
5. I didn't mince matters: I said he was an idiot.
   我不諱言，我說過他是白癡。
6. What a stupid idiot!
   真是個(gè)愚蠢的白癡！
7. He is an idiot to agree.
   他要是同意，就太傻了。

id.i.ot

n.（名詞）
A foolish or stupid person.
白癡，傻子：很笨或很愚蠢的人
A person of profound mental retardation having a mental age below three years and generally being unable to learn connected speech or guard against common dangers. The term belongs to a classification system no longer in use and is now considered offensive.
低智商者：指智力水平在三歲小孩以下，聽不懂連貫話語，也不會(huì)提防普通危險(xiǎn)的智力有嚴(yán)重障礙的人。這個(gè)詞現(xiàn)在已不用來區(qū)別人的類型，現(xiàn)在被認(rèn)為有對(duì)人不友好的意思

來源：
Middle English [ignorant person]
中古英語 [缺乏教育的人]
from Old French idiote
源自 古法語 idiote
from Latin idiôta
源自 拉丁語 idiôta
from Greek idiôtôs [private person, layman]
源自 希臘語 idiôtôs [私人，外行]
from idios [own, private] * see s(w)e-
源自 idios [自己的，私人的] *參見 s(w)e-