(physics) coefficient of restitution

(algebra) coefficient

cardboard (corrugated)

repulsion, resistance / revolt / (stock market) rally, recovery

to repel, to oppose, to revolt / (stock market) to rally, to recover

ball (sphere) / (basebal) ball (pitch that falls outside the strike zone)

bowl

Short for ボール紙 (bōru-gami): non-corrugated cardboard, pasteboard / Short for 段ボール (danbōru): corrugated cardboard

ball (formal dance event)

August