反哺

反哺	fǎn bǔ	to support one's parents in their old age / to show filial piety / to to repay / to return a favor
反	fǎn	contrary / in reverse / inside out or upside down / to reverse / to return / to oppose / opposite / against / anti- / to rebel / to use analogy / instead / abbr. for 反切 phonetic system
哺	bǔ	to feed
哺	bū	to eat / evening meal