词根：-us-, -util-, -ut-

【词根含义】：用

【词根来源】：来源于拉丁语名词usus(用,用法)、动词utor, uti, usus, sum(使用)和形容词util.is(有用的)。

【同源单词】：abuse, misuse, use, used, useful

词根词缀：-less

【来源及含义】Old English: -leas, from leas, "free from, devoid of, false, feigned"; suffix meaning "lacking"

【同源单词】aimless, artless, avoidless, causeless, ceaseless, charmless

词根词缀：us-, ut-

【来源及含义】Latin: use, employ, practice

【同源单词】Ab abusu ad usum non valet consequentia, abuse, abuse, abuse, abusive, abusively