魔 (Kanji for devil)

Onyomi

Devils always beat demons at MA Jongg

邪魔(じゃま) します	interrupt ★★★★☆ 1/2 KANA 邪 (heresy) + 魔 (devil) = 邪魔 (interrupt) to interrupt. Often heard in the phrase: おじゃまします!('May I come in?') Used with co-workers or friends who are busy. Not used when you go to a store or someone's house.
悪魔(あくま)	devil ★★★☆☆ 悪 (bad) + 魔 (devil) = 悪魔 (devil) I am The Devil, do you understand?!? (used only for the Christian devil, not native Japanese demons,which are 鬼。)
魔法(まほう)	witchcraft ★★★☆☆ 魔 (devil) + 法 (law) = 魔法 (witchcraft ) witchcraft - Applies to anything - flying, shooting lightning, turning dudes into trout.
魔女(まじょ)	witch ★★★☆☆ 魔 (devil) + 女 (woman) = 魔女 (witch)