noun
A basic knot used to join two ropes of similar thickness; also called a flat knot. Common in sailing, camping, and everyday tying.
ロープをこま結びでしっかり結んだ。
I tied the ropes securely with a reef knot.
こま結びはほどけやすいので、重要な場面では別の結び方を使う。
Since a reef knot can come undone easily, use a different knot for critical situations.
The term こま結び likely derives from 細 (こま, fine/detailed) or 小間 (こま, small space), referring to the neat, compact nature of the knot. The exact origin is uncertain.