敲小背

• 高(tall; high)ASSOCIATIVE
• 攴(hand holding stick; striking hand)RADICAL

A hand holding a stick tapping on something high creates a ringing sound—that is the action of tapping, tapping lightly.

• 小(small; tiny)ASSOCIATIVE

Three tiny strokes represent fine grains of sand, conveying the meaning of "small" or "tiny."

• 北(north)PHONETIC
• ⺼(flesh; body)RADICAL

The back is the meat on the rear side, like facing north with your back turned away from the sun.