摧
サイ, サ, くだ.く

break, smash, crush, familiar, popular

JLPT0 G13 S0 F5000

As per 崔# (squat) + 手 hand/action indicator → *crush*/*smash*/*break* in making squat (compare 挫). Also, *stretch* (to the point of causing destruction/harm).

[Full Kanji Etymology List]