unnovaWiktionary 原文英美构词拆解unun-前缀novanova词干un-(added to adjectives or past participles) not · (added to nouns) lack of词源说明From un- + nova. From being similar to a supernova-process collapse, without the bright novalike outburst.释义名词noun1(astronomy) The collapse of a star which cannot explode in a supernova.