retain

keep, retain, reserve, preserve, conserve, withhold

动词 retain:

1. hold within
2. allow to remain in a place or position
   同义词：continue, keep, keep on, keep going
3. secure and keep for possible future use or application
   同义词：hold, keep back, hold back
4. keep in one's mind

1. Her memory retains everything she reads.
   她过目不忘。
2. He retained the best lawyer in the state to defend his case.
   他为他的案子聘了该州最好的律师。
3. I will retain my right.
   我将保留我的权力。

re.tain

v.tr.（及物动词）
re.tained,re.tain.ing,re.tains 缩写 ret.
To maintain possession of.See Synonyms at keep
保持财产占有参见 keep
To keep or hold in a particular place, condition, or position.
保持，保留：保持或维持在一个特殊的场所、条件或位置
To keep in mind; remember.
留在心中；记住
To hire (an attorney, for example) by the payment of a fee.
雇用：付费雇用（例如律师）
To keep in one`s service or pay.
付定金保留：保留某人的服务或受雇状态

来源：
Middle English retainen
中古英语 retainen
from Old French retenir
源自 古法语 retenir
from Latin retinôre
源自 拉丁语 retinôre
re- [re-]
re- [表示.再.]
tenôre [to hold] * see ten-
tenôre [维持] *参见 ten-

【引伸】
retain.abil.ity
n.（名词）
retain.able
adj.（形容词）
retain.ment
n.（名词）