名詞 nut:

1. usually large hard-shelled seed
2. Egyptian goddess of the sky
3. a small (usually square or hexagonal) metal block with internal screw thread to be fitted onto a bolt
4. half the width of an em
   同義詞：en
5. a whimsically eccentric person
   同義詞：crackpot, crank, nut case, nutcase, fruitcake, screwball
6. someone who is so ardently devoted to something that it resembles an addiction
   同義詞：addict, freak, junkie, junky
7. one of the two male reproductive glands that produce spermatozoa and secrete androgens
   同義詞：testis, testicle, orchis, ball, ballock, bollock, egg

動詞 nut:

1. gather nuts

1. She's a tough nut to crack; I don't think she'll give us permission.
   她這個人不好說話，我想她不會答應我們的。
2. Cashew nuts and walnuts are both nuts.
   腰果和核桃都是堅果。
3. He can't play football for nuts!
   他對踢足球一點兒不摸門兒。
4. I am a Clark Gable nut: I have seen all his films.
   我是克拉克·蓋博的影迷，我看過他演的所有影片。

nut

n.（名詞）

An indehiscent, hard-shelled, one-loculated, one-seeded fruit, such as an acorn or a hazelnut.
堅果：一種不開裂，硬殼，單隔室，單種子的果實，如橡樹果實或榛子
A seed borne within a fruit having a hard shell, as in the peanut, almond, or walnut.
堅果種子：生長在有硬殼的果實之內(nèi)的種子，如花生、杏或核桃
The kernel of any of these.
堅果仁：這些堅果的仁
Slang
【俚語】
A crazy or eccentric person.
瘋子，怪人：瘋狂或古怪的人
An enthusiast; a buff:
狂熱者：狂熱的人；入迷的人：
例句：
a movie nut.
電影迷

Informal A difficult endeavor or problem:
【非正式用語】 難事，難題：
例句：
Painting the closet was a tough nut to crack.
給壁櫥刷漆不是件容易事

Slang The human head.
【俚語】 腦袋，頭
Music
【音樂】
A ridge of wood at the top of the fingerboard or neck of a stringed instrument, over which the strings pass.
琴弓：指板頂部或弦樂器琴勁處木質(zhì)的凸起部分，琴弦繞在上面
A device at the lower end of the bow for a stringed instrument, used for tightening the hairs.
松緊旋紐：琴弓尾端的裝置，用于松緊金屬絲
A small block of metal or wood with a central, threaded hole that is designed to fit around and secure a bolt or screw.
螺母，螺帽：中部有螺紋用于與螺栓或螺釘相配合的小塊金屬或木頭
Slang
【俚語】
The cost of launching a business venture.
本錢：開展生意所需的費用
The operating expenses of a theater, theatrical production, or similar enterprise:
經(jīng)費：劇院、戲劇制作和相似事業(yè)的運作費用：
例句：
.The[theater] has simply failed to attract enough paying customers per week to meet its nut. (Variety)
.［劇院］ 沒能每周吸引足夠的顧客以解決經(jīng)費問題. (種類)

nuts Vulgar Slang The testicles.
nuts 【粗俗用語】 【俚語】 一對睪丸
v.intr.（不及物動詞）
nut.ted,nut.ting,nuts
To gather or hunt for nuts.
采干果，拾堅果

來源：
Middle English nute
中古英語 nute
from Old English hnutu
源自 古英語 hnutu

【引伸】
nut.ter
n.（名詞）