The Chinese word for nut is
坚果

jiān guǒ

Translations for nut and their definitions

堅果
1. n. nut

螺母
1. n. (mechanics) screw nut (female component of nut and bolt)

坚果
1. Simplified form of 堅果

母
1. mother
父母 - father and mother
母子 - mother and son
(ant, zh, 父)
2. (Used to address a female elder member of a family.)
姑母 - father's sister
祖母 - grandmother
(ant, zh, 父)
3. (of animal) female
母牛 - female cow
Synonyms: 雌
(ant, zh, 公)
4. pertaining to origin
母校 - alma mater

螺帽
1. n. nut (female component of nut and bolt)

球
1. ball; globe; orb
氣球 - balloon
雪球 - snowball
2. (mathematics) ball; solid sphere
3. earth
全球 - whole world
4. ball (in sports)
發球 - to serve
一個籃球 - a basketball
5. ball game
球迷 - fan of a ball sport
一場球 - a ball game
6. (Classifier for spherical objects.)
一球毛線 - a ball of knitting wool
7. (Teochew, Xiang) (Classifier for stringed objects.) string
8. (dialectal Mandarin, Jin, vulgar) (Expletive. Often used in the form of ……個球(…… my ass). Underlying meaning may be "testes".)
9. (Cantonese, colloquial) million dollars
10. (Singapore, slang) testicle
11. (medicine, attributive) bulbar
12. Variant of 璆