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

前缀：ab-

【词根含义】：分离,脱离;相反;加强意义

【词根来源】：来源于拉丁语前缀ab-。

【同源单词】：abbreviate, abbreviation, abbreviator, abdicate, aberrance

词根词缀：a-, ab-, abs-

【来源及含义】Latin: prefix; from, away, away from

【相关描述】This prefix is normally used with elements of Latin and French origins (abs- usually joins elements beginning with c, q, or t).

The form ab- is regularly used before all vowels and h; and it becomes a- before the consonants m, p, and v. The prefix apo- has similar meanings.

This list is a very small sample of the multitudes of a-, ab-, abs- prefixes that are available in dictionaries and those in this unit are only meant to present a few examples.

【同源单词】abampere, abampere centimeter squared, abampere per square centimeter, abarticular, abarticulation, abbreviate

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