消蚀

消蚀	xiāo shí	to corrode; to erode; to wear away (lit. and fig.)
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
蚀	shí	to nibble away at sth / to eat into / to erode