音标：[æd,әd,id] ；

见于拉丁词源的字, 表示“向...”之义

As a prefix ad- assumes the forms ac-, af-, ag-, al-, an-, ap-,
ar-, as-, at-, assimilating the d with the first letter of the word to
which ad- is prefixed. It remains unchanged before vowels, and before
d, h, j, m, v. Examples: adduce, adhere, adjacent, admit, advent,
accord, affect, aggregate, allude, annex, appear, etc. It becomes ac-
before qu, as in acquiesce.

ad-的用法和样例：

词汇搭配

ad referendum<拉>待进一步审核(...
attack ad攻击性广告
employment ad[经] 招聘广告...
ad hoc特定的
ad hominem诉诸感情的
ad infinitum无限(永远)
ad litem<拉>专为某一诉讼指...
want ad征求广告
ad interim临时的
ad craft[经] 广告办理业...
ad court单数局
classified ad分类广告
comparison ad比较广告,(新旧产品...
ad finem最后(最终)
ad valorem按价的
ad lib.[医] 随意，任意...
ad libitum随意地
want ad.招聘广告
ad out接球人得的第一分...
argumentum ad rem[法] 中肯的论证...

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