noun
sewing thread; suture
General term for thread used in sewing; also used in medical contexts for surgical sutures.
縫い糸が足りなくなったので、買い足しに行った。
I ran out of sewing thread, so I went to buy more.
手術後、医師は縫い糸を抜いた。
After the surgery, the doctor removed the sutures.
Compound of 縫い (nui, 'sewing', from verb 縫う nuu) and 糸 (ito, 'thread').