also: ましん
noun
Refers to a malevolent supernatural being, often with great power. Can be used in fantasy, mythology, or metaphorically for a cruel person.
その魔神は村を破壊した。
The demon destroyed the village.
彼はまるで魔神のように冷酷だ。
He is as ruthless as a devil.
Compound of 魔 (ma, 'demon, evil influence') and 神 (shin/jin, 'god, deity'). The combination suggests a god-like being of evil nature.