犯讳

犯讳	fàn huì	to use the tabooed name 名讳 of hierarchical superiors (old) / to violate a taboo / to use a taboo word or character
犯	fàn	to violate / to offend / to assault / criminal / crime / to make a mistake / recurrence (of mistake or sth bad)
讳	huì	to avoid mentioning / taboo word / name of deceased emperor or superior