adult [ ad-=to 到；ult = grown up 成长 =>“grown up to full size 长大成型的” →] a . fully-grown; fully developed 已成熟的；已成 年的 / The magazine is meant for adult readers.该杂志是面向成年读者的。

adulthood n. 成年

addict [ ad- = to 到；diet = to say 说 =>“to say yes to 对…表不赞成”=>“to give over to 纵情于…”→] v. give up to (a hobby)沉溺于，醉心于 / He addicted himself to gamble.他赌上癒了。

addiction n. 沉溺，吸毒成瘾 

addictive a. 使成瘾的；上瘾的

adhere [ad- = to 到；her = to stick 粘；-e => “to stick to sth.粘到某物上”→]v.① stick fast 粘附 / Paint adheres best to a clean, dry surface. 油漆在干燥洁净的表面上粘得最牢。②remain attached 依附，坚持 / Don't adhere to your own ideas when you are proved wrong.既然证明你错了，就不要固执己见了。

adherence n.依附；信奉；坚持；固执

adherent a. 粘着的 n.信徒，追随者

adjacent [ad-= at 在；jac = to lie 位于；-ent a. = -ing =>“lying at or near 位于附近的”→]a. neighbouring 邻近的 / The house adjacent to ours has been sold. 与我们相近的那座房子已经出售了。