noun
weight-chain-pole weapon; flail
A martial arts weapon consisting of a pole with a weight attached by a chain; used in some traditional Japanese schools.
古武術では、ちぎりきの振り回し方を学ぶ。
In classical martial arts, one learns how to swing the chigiriki.
フレイル is a general term for a flail weapon, while ちぎりき specifically refers to the Japanese pole-and-chain version.
The origin is uncertain; the kanji 乳切り木 literally means 'breast-cutting wood', but the connection to the weapon is unclear.