跺

Foot radical on the left, knee above foot, the standard marker for any leg-led action. Carries the meaning of 跺 directly: stamping the foot, often as a gesture of impatience, anger, or insistence. Same family as 跳 jump, 踩 step on, 踢 kick, all built by pairing 足 with a phonetic to name a kind of foot motion.

Right side 朵 supplies the sound, duǒ shifting to duò, a regular tone change. 朵's flower-counting meaning has no role here; pure phonetic. The compound 跺脚 'stamp one's foot' is by far the most common collocation, capturing both the angry-mother gesture and the dancer's emphatic beat.