違 different and therefore wrong

I am different and wrong, and so is this dictionary.

Moving towards an orgy is different and wrong.

a mistake ★★★★★ 1/2 KANA
間 (a period of time) + 違 (different and therefore wrong) = 間違い (a mistake)

Verb form; 間違える！

misunderstanding ★★★☆☆
勘 (perception) + 違 (different and therefore wrong) = 勘違い (misunderstanding)

a misunderstanding - like the related term 誤解 , but 勘違い is a little smaller. If I'm reading and confuse one kanji with a similar looking kanji, that's 勘違い. But if I see my fiancee with her cousin from out of town, and assume she's having an affair and punch the guy, that's 誤解

fuckin' crazy ★★★☆☆ ABU
気 (mood) + 違 (different and therefore wrong) = 気違い (fuckin' crazy)

(literally, 'different feeling') crazy - this is one of the biggest cusses in the whole language-a garunteed fight-starter. This is instructive in several ways.

1) Japanese is such a polite language that 'different feeling' is one of the worst insults.

2) it takes a certain kind of culture to think that having a different feeling is such a bad thing in the first place!

3) Historically it is a discriminatory term against people who suffer from mental illness.

a somewhat formal word for difference ★☆☆☆☆ NP
相 (partner) + 違 (different and therefore wrong) = 相違 (a somewhat formal word for difference)