ad-

名词 ad-:

1. a public promotion of some product or service
   同义词：ad, advertisement, advertizement, advertising, advertizing, advert

副词 ad-:

1. in the Christian era; used before dates after the supposed year Christ was born
   同义词：AD, A.D., anno Domini

Important derivatives are: at aid
重要派生词为： at aid
To, near, at.
朝向, 接近, 在.

ado , at , from Old English ôt , near, by, at, and from Middle English at , .to,. from Old Norse at , both from Germanic *at .
ado , at , 源自 古英语 ôt , 接近, 经过, 在, 并且源自 中古英语 at , .向,. 源自 古斯堪的纳维亚语 at , 两者都源自 日耳曼语 *at .
ad- , -ad ; ( adjuvant ), aid , amount , ( paramount ), from Latin ad , ad- , to, toward.
ad- , -ad ; ( adjuvant ), aid , amount , ( paramount ), 源自 拉丁语 ad , ad- , 朝向, 向.
来源：
Pokorny .ad- 3.
波科尔尼 .ad- 3.