1.
chin strap (of a hat, helmet, or mask)
A strap or cord attached to a hat, helmet, kasa, mask, or similar headgear that passes under the chin to keep the item securely on the wearer's head. Found on construction helmets, military helmets, riding helmets, traditional sedge hats (菅笠), kindergarten hats, and elementary-school yellow safety hats.
顎紐を締める。
Tighten the chin strap.
ヘルメットの顎紐が緩んでいる。
The chin strap of the helmet is loose.
風が強い日は、帽子の顎紐をしっかり掛けておこう。
On a windy day, make sure to fasten your hat's chin strap securely.
自転車用ヘルメットは、顎紐を正しく装着しないと安全性能を十分発揮できない。
Bicycle helmets cannot deliver their full safety performance unless the chin strap is properly fastened.
Composed of 顎 (chin; jaw) and 紐 (string; cord; strap). The simple, transparent compound is the standard everyday word; there is no commonly used loanword equivalent in Japanese.
USAGE:
A general everyday term that covers any chin-securing strap, regardless of material — leather, woven nylon, plastic, or fabric. Frequently appears in contexts of safety equipment (construction sites, traffic safety), school uniforms (the yellow 通学帽 worn by elementary-school children), traditional dress (festival hats), and outdoor sports. The same item is sometimes called {あご{ひも}}, written entirely in hiragana on consumer products.
COMMON COLLOCATIONS:
- 顎紐を締める: to tighten the chin strap
- 顎紐を緩める: to loosen the chin strap
- 顎紐を掛ける: to fasten the chin strap (around the chin)
- 顎紐付き帽子: hat with a chin strap
SIMILAR WORDS:
- 紐: string; cord — the broader category of which 顎紐 is one type
- 耳掛け: ear loop — used for masks, hooks over the ears rather than under the chin
- 鉢巻: headband — wraps around the head, not under the chin
- 帽子: hat — the typical item that requires a 顎紐