Filial Piety
noun, な adjective
If you go towards filial piety, you are going to be doing filial piety. Do this for your parents.
こうこう
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
女房が死ぬ前に、もっと孝行しておくんだったな。
I wish I devoted myself more to my wife before she passed away.