Latin inusitatus, from in- in- entry 1 + usitatus usual, customary, from past participle of usitor to use often, from usus, past participle of uti to use
英语词典包含469781条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。