unalterableWiktionary 原文英美构词拆解unun-前缀alterablealterable词干un-(added to adjectives or past participles) not · (added to nouns) lack of词源说明From un- + alterable.释义形容词adjective1Incapable of being altered, or of changing.2Irreversible, irrevocable.同族词派生词 3unalterability·unalterableness·