Are the 3 words all synonyms or do they refer to specific types of zippers,
like a zipper on pants or jacket versus a zipper on a suitcase?
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2021-11-11T22:49:27.970
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question
meaning word-choice
Do チャック, ジッパー, and ファスナー all mean "zipper" in Japanese or do they refer to different types of zippers?
Basically they are synonymous (souces: [1](https://www.tamagawa-
sangyo.co.jp/information/775/),
[2](https://www.ykk.co.jp/japanese/ykk/mame/fas_01.html)).

According to the web, チャック derived from [巾着]{きんちゃく} in 1927. Possibly because
of this, in the idiomatic expression '口にチャック' = 'to be quiet', the other two
cannot be used.

Possibly for the same reason, チャック seems to fit better in some cases than the
others: The zipper of trousers is usually called チャック; When a bag has the
zipper, チャックになってる sounds more common (to me).
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2021-11-11T23:17:06.490
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answer