ungrabWiktionary 原文构词拆分un-前缀(added to adjectives or past participles) not · (added to nouns) lack of+grab词根/词干原始词根原始印欧语 *gʰrebʰ-词源说明From un- + grab.释义（英文）动词 Verb(transitive, computing) To release (a device) that was previously captured for exclusive use.