弾 means “bullet, play (an instrument), bounce”

だん · dan

Also: twang, flip, snap

Kun'yomi (Japanese reading)
ひく, はずむ, たま, はじく, はじける
On'yomi (Chinese reading)
ダン, タン

JLPT N1 · Taught in secondary school · 12 strokes

The story

A bow (弓) and 単: 弾 once meant a bow that shot pellets instead of arrows. Anything sprung loose fits: a bullet (弾丸), a bomb (爆弾), a chat that 弾む, bounces along, and a guitar or piano you 弾く, play.

Used in 爆弾 (bakudan, bomb), 弾く (hiku, to play an instrument), and 弾む (hazumu, to bounce/liven up)

More from Arms & the Hunt

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Readings from KANJIDIC2, © EDRDG, CC BY-SA.