unbeknownWiktionary 原文英/ʌnbɪˈnəʊn/美/ˌʌnbɪˈnoʊn/构词拆解unun-前缀beknownbeknown词干un-(added to adjectives or past participles) not · (added to nouns) lack of词源说明From un- + beknown.释义形容词adjective1Not beknown.