Translation of "screw" - English-Japanese dictionary

screw

noun uk /skruː/

a small, pointed piece of metal that you turn round and round to fasten things together

ねじ, ねじくぎ
have a screw loose

If you say that someone has a screw loose, you mean that they behave in a strange way and seem slightly mentally ill.

頭がおかしい, 頭のねじが緩んでいる

(Translation of “screw noun” from the Cambridge English–Japanese Dictionary © Cambridge University Press)