1To fall out of use or go out of fashion; to become obsolete or die out.
古いやり方は次第に廃っていった。
The old method gradually fell out of use.
その風習は若い世代には廃れている。
That custom has gone out of fashion among the younger generation.
この制度は効率が悪く、すぐに廃ってしまった。
This system was inefficient and quickly became obsolete.
2To have one's honor or reputation harmed or sullied (used in expressions like 'one's name/reputation is ruined').
そんな噂が立てば彼の名が廃る。
If such rumors spread, his reputation will be ruined.
面目が廃るようなことはしたくないと彼は言った。
He said he did not want to do anything that would disgrace him.