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ogre; demon; oni
spirit of a deceased person
ogre-like person (i.e. fierce, relentless, merciless, etc.)
it (in a game of tag, hide-and-seek, etc.)
Chinese "ghost" constellation (one of the 28 mansions)
very; extremely; super-
子供がお祭りで鬼のお面をかぶって遊んだ。
The child wore an ogre mask.
子供たちは鬼ごっこをして遊んでいる。
The children played tag.
彼は仕事の鬼と呼ばれるほど働き者だ。
He is called a demon at work.