Mnemonic comic for 用

yòng = yu + (e)ng4: to use / to employ / to have to / to eat or drink / expense or outlay / usefulness / hence / therefore

Mnemonic symbol: a first aid kit. Can you see the cross on the container?

Yu the Great (yu) hurt his leg when he slipped in the engine's bathroom ((e)ng4). The moon (月) helps him to splint his leg using (用) the bathroom's first aid kit (用) and a dinosaur bone (丨).