消毒

消毒	xiāo dú	to disinfect; to sterilize
消	xiāo	to diminish; to subside / to consume; to reduce / to idle away (the time) / (after 不 or 只 or 何 etc) to need; to require; to take
毒	dú	poison / to poison / poisonous / malicious / cruel / fierce / narcotics