unsolderWiktionary 原文中文unsold 的变形来自 ECDICTadj.未售出的构词拆分un-前缀(added to adjectives or past participles) not · (added to nouns) lack of+solder词根/词干词源说明From un- + solder.释义（英文）动词 VerbTo reverse the process of soldering, such as by breaking the joint and removing the solder