unthreateningWiktionary 原文中文来自 ECDICT不威胁的构词拆分un-前缀(added to adjectives or past participles) not · (added to nouns) lack of+threatening词根/词干词源说明From un- + threatening.释义（英文）形容词 AdjectiveNot threatening词族派生词（2）unthreateninglyunthreateningness