魔
1
demon;devil;evil spirit;evil influence
株式市場は魔の市場だとよく言われる。
The stock market is often called a dangerous one.
2
-crazed person;-obsessed person;fiend
See also:
覗き魔 (のぞきま)
まずいよ。また遅刻だ！！はやくも遅刻魔の異名をとってしまう。
Oh no! I'm late again!! I'm going to get the nickname 'King of Late arrival'.
3
dreaded;terrible;awful;dreadful