弾む
はずむ · hazumu · JLPT N1 · verb-godan
to bounce
🏀 弾む = 弾く (to flick, spring back) + む. Same 弾 as 弾力 (elasticity): a ball's bounce.
The same springy lift covers all three meanings: a ball bouncing, a heart bouncing up when encouraged, and money bouncing out of the wallet to splurge.