If you live in a democracy, be in touch with your representatives. Even if you live in a country where things are going fine, be in touch and let them know you’re paying attention. It turns out that taking the smooth and proper functioning of government for granted is a dangerous error.
Literally: evil – reverse / wicked – no – way / teachings / morality
Alternately: Unfathomable evil. Heinous words or deeds. Violating basic human morality. Atrocity.
Notes: Apparently 悪逆 used to have a technical definition under the old Ritsuyou legal system: it was the murder of a family member, one of eight crimes for which no amnesty could be granted. 無道, logically enough, was to be lacking in human 道理 (douri), “reason” or “truth.”
This compound has a relatively large number of variants, including alternate pronunciations like ~bu.dou and ~mu.tou for 無道. The 無 may also be replaced by synonym 非 (hi).