• 鬼おに — ogre; demon; (colloq.) tough person
• 鬼おにごっこ — tag (children’s game)
• 鬼おにに金棒かなぼう — “like giving a metal club to an ogre”; making the strong even stronger
• 鬼面きめん — demon mask
• 鬼神きしん — fierce deity; demon-god
• 鬼才きさい — prodigious talent

鬼 depicts a fearsome spirit with a head and body, evoking an otherworldly presence. As a radical, it groups words related to spirits, demons, and the uncanny.