noun
dark hole; dark pit
Literal meaning: a hole or pit that is dark. Can be used figuratively for a dark, unknown place or situation.
洞窟の奥には深い暗穴が口を開けていた。
Deep in the cave, a dark hole gaped open.
noun
Slang or derogatory term for a stupid person, likening them to a dark, empty hole. Rare and possibly archaic.
あいつは本当に暗穴だな。
That guy is a real idiot.
noun
road taken by a Chinese ajari monk fleeing Emperor Xuanzong's wrath
Historical abbreviation of 闇穴道 (あんけつどう), referring to a specific escape route used by a Buddhist monk in 8th-century China. Very rare, specialized term.
See also: 闇穴道
「暗穴」は、玄宗皇帝の怒りを買った僧が通った道を指す歴史用語だ。
"Anketsu" is a historical term for the road taken by a monk who incurred Emperor Xuanzong's wrath.
Full form of the historical term; 暗穴 is an abbreviation.
Compound of 暗 (dark) and 穴 (hole). The historical sense is an abbreviation of 闇穴道. The slang sense likely derives from the literal meaning.