unobtainableWiktionary 原文中文来自 ECDICTadj.难获得的构词拆分un-前缀(added to adjectives or past participles) not · (added to nouns) lack of+obtainable词根/词干词源说明From un- + obtainable.释义（英文）形容词 AdjectiveUnable to be obtained: not able to be acquired or reached.名词 NounSomeone or something that cannot be obtained.词族派生词（5）unobtainabilityunobtainablenessunobtainablyunobtainiumunobtanium