敲大背

• 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.

• 大(person stretching limbs; figure of person with outstretched arms and legs)ASSOCIATIVE

A person standing with arms and legs spread wide symbolizes greatness and magnificence.

• 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.