insufferable

From Late Middle English insufferable (“unbearably painful, intolerable”), and then either: * from in- (prefix meaning ‘not’) + sufferable, souffrable (“bearable, endurable, tolerable; allowable, permissible; able to or willing to bear hardship; forbearing, long-suffering; calm, self-restrained, slow to anger; capable of suffering”) (from Anglo-Norman sufferable, souffrable, and Old French souffrable, suffrable (“sufferable, tolerable”)); or * from Old French insouffrable (“which cannot be endured or suffered; something insufferable or unendurable”) (now dialectal), from in- (prefix meaning ‘not’) + souffrable, suffrable.

出典: Wiktionary「insufferable」（CC BY-SA 4.0）