ねじ

ねじ

(a) screw

JLPT N2

Meaning and Usage

"ねじ" refers to a screw, a common fastener used to hold objects together by twisting it into materials. It is a basic but essential hardware component in construction, furniture assembly, and machinery.

Common Contexts

You will often hear "ねじ" in contexts involving fixing or assembling things, such as furniture, electronics, or mechanical devices. It is a concrete noun and usually appears with verbs like "回す" (to turn), "締める" (to tighten), or "緩む" (to loosen).

Collocations and Patterns

  • ねじを回す: to turn a screw, used when installing or removing screws.
  • ねじを締める: to tighten a screw, important for securing parts firmly.
  • ねじが緩む: the screw becomes loose, often a cause of malfunction.

Register and Usage Notes

"ねじ" is a neutral, everyday word used in both casual and technical contexts. It is not formal or honorific. Learners should not confuse "ねじ" with "ボルト" (bolt), which is a similar but usually larger fastener.

Common Mistakes

A common learner mistake is to confuse "ねじ" with "ボルト" or to misuse the verb "回す" with bolts, which often require a wrench rather than turning by hand. Remember, "ねじを回す" is typical for screws that can be turned manually or with a screwdriver.

Example Sentences

このつくえのあしはねじでしっかりこていされています。

The legs of this desk are firmly fixed with screws.

ねじをまわしてドアのとってをとりつけました。

I turned the screw and attached the door handle.

ねじがゆるんでいるときかいがうまくうごきません。

If the screws are loose, the machine won't work properly.