unforeseenWiktionary 原文中文来自 ECDICTadj.未预料的构词拆分un-前缀(added to adjectives or past participles) not · (added to nouns) lack of+foreseen词根/词干词源说明From un- + foreseen.释义（英文）形容词 AdjectiveNot foreseen.Not expected.名词 NounAn event, incident, cost, etc. that was not foreseen.词族派生词（2）unforeseenlyunforeseenness