1Thread, yarn, or string — a thin, long strand of twisted fiber (cotton, silk, etc.) used for sewing or weaving; also used for other thin cord-like things (kite string, fishing line) and as a suffix in compounds.
ボタンが取れたので糸と針で縫い付けた。
The button came off, so I sewed it back on with thread and a needle.
凧に長い糸をつけて空に飛ばした。
I attached a long string to the kite and flew it in the sky.
クモが糸を使って巣を作っている。
The spider is using its thread to build a web.
セーターを編むために毛糸を買った。
I bought yarn to knit a sweater.