noun
unfeeling person; callous person; heartless person
Rare literary term for a person as unfeeling as wood or stone. Not used in everyday conversation; modern Japanese would more often use 無情な人 or 冷たい人.
彼はまるで木石漢のように、人の苦しみに無関心だった。
He was indifferent to people's suffering, just like a heartless person.
Compound of 木 (wood), 石 (stone), and 漢 (man), literally 'wood-stone man', implying a person as unfeeling as wood or stone. The exact historical origin is uncertain, but it follows a classical Chinese-derived pattern of figurative compounds.