常用

常 = 小 + 冖 + 吊 : Mnemonic symbol: the centennial light, a light bulb which will shine forever and ever.

常 = 小 + 冖 + 吊 : Charlie Chaplin is fighting his way through anglepod's underbrush with a coat hanger. The anglepod has not been visited in a hundred years, and with his coat hanger, Charlie Chaplin has to cut down a lot of daisies. Finally he found what he was looking for: the centennial light, protected from the daisies and the rain by a cooking top.

用 = 丨 + 月 : Mnemonic symbol: a first aid kit. Can you see the cross on the container?

用 = 丨 + 月 : Yu the Great hurt her leg when she slipped in the engine's bathroom. The moon helps her to splint her leg using the bathroom's first aid kit and a dinosaur bone.