know

know, learn, comprehend, understand

名词 know:

1. the fact of being aware of information that is known to few people

动词 know:

1. be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about
   同义词：cognize, cognise
2. know how to do or perform something
3. be aware of the truth of something; have a belief or faith in something; regard as true beyond any doubt
4. be familiar or acquainted with a person or an object
5. have firsthand knowledge of states, situations, emotions, or sensations
   同义词：experience, live
6. accept (someone) to be what is claimed or accept his power and authority
   同义词：acknowledge, recognize, recognise
7. have fixed in the mind
8. have sexual intercourse with
   同义词：roll in the hay, love, make out, make love, sleep with, get laid, have sex, do it, be intimate, have intercourse, have it away, have it off, screw, fuck, jazz, eff, hump, lie with, bed, have a go at it, bang, get it on, bonk
9. know the nature or character of
10. be able to distinguish, recognize as being different
11. perceive as familiar

1. I know Paris better than Rome.
   我对巴黎比对罗马熟悉。
2. He's sometimes been known to sit there all day.
   有时能见到他整天坐在那里。
3. I know London as the place where I spent my childhood.
   我熟悉伦敦，那是我度过童年的地方。
4. She knows a bargain when she sees one.
   她有辨别便宜货的能力。
5. I've known Tom for years.
   我认识汤姆很多年了。
6. He has known both grief and happiness.
   忧患和快乐他都经历过。
7. I know what happened.
   我知道发生了什么事。

know

v.（动词）
knew[nô, nyô] known[nôn] know.ing,knows
v.tr.（及物动词）
To perceive directly; grasp in the mind with clarity or certainty.
通晓，领悟：直接地理解；在心中清晰或明确地掌握
To regard as true beyond doubt:
确信，认为：认为是确实的，无可怀疑的：
例句：
I know she won`t fail.
我确信她不会输

To have a practical understanding of, as through experience; be skilled in:
了解，熟练，擅长：通过经历，对…有实践上的了解；熟练于某事：
例句：
knows how to cook.
擅长烹饪

To have fixed in the mind:
牢记：印在脑子里：
例句：
knows her Latin verbs.
记住她的拉丁动词

To have experience of:
经历过：
例句：
.a black stubble that had known no razor.(William Faulkner)
.很久没刮过的黑胡茬.(威廉·福克纳)

To perceive as familiar; recognize:
察觉，认得：看上去觉得熟悉；认识：
例句：
I know that face.
我认识那个人

To be acquainted with:
与…熟悉：
例句：
He doesn`t know his neighbors.
他和邻居不熟

To be able to distinguish; recognize as distinct:
辨别：能够区分；找出不同点：
例句：
knows right from wrong.
辨别对错

To discern the character or nature of:
看出，辨识：看到…的特征或性质：
例句：
knew him for a liar.
看出他是个骗子

Archaic To have sexual intercourse with.
【古语】 与…发生性关系
v.intr.（不及物动词）
To possess knowledge, understanding, or information.
拥有知识、理解力或信息
To be cognizant or aware.
知道，明白

<习惯用语>in the know【非正式用语】
Possessing special or secret information.
知道的，消息灵通的：掌握特别或秘密的信息的
you know【非正式用语】
Used parenthetically in conversation, as to fill pauses or educe the listener`s agreement or sympathy:
你知道，你要知道：在谈话中作插入语，用于填补停顿或获取听者的赞同或认同：
例句：
Please try to be, you know, a little quieter. How were we supposed to make camp in a storm like that, you knowô
请你尽量安静一点。你知道，我们在那样的暴风雨中怎么扎营呢ô

来源：
Middle English knowen
中古英语 knowen
from Old English cn3wan * see gnô-
源自 古英语 cn3wan *参见 gnô-

【引伸】
know.able
adj.（形容词）
know.er
n.（名词）