also: むけんならく
noun
Avici hell; the deepest hell in Buddhism
Buddhist term for the eighth and most painful hell, where suffering is uninterrupted. Often used metaphorically for an inescapable, hellish situation.
仏教では、無間奈落は最も苦しみの多い地獄とされる。
In Buddhism, Avici hell is considered the most painful hell.
彼は借金地獄を無間奈落に例えた。
He likened his debt-ridden life to Avici hell.
From Buddhist terminology; 無間 (muken, 'without interval') refers to uninterrupted suffering, and 奈落 (naraku) is a transliteration of Sanskrit naraka (hell). The reading むげん is a variant of むけん.