What does ねじ mean?
ねじ is a Japanese noun meaning “(a) screw” in English. It can also be translated as “key (of a clock, watch, etc.)” depending on context. It is written as ねじ in hiragana, and neji in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
この機械は１時間に千個のねじを製造する。
This machine cranks out a thousand screws an hour.