witness

look, see, watch, observe, witness

proof, evidence, witness, testimony

名词 witness:

1. someone who sees an event and reports what happened
   同义词：witnesser, informant
2. a close observer; someone who looks at something (such as an exhibition of some kind)
   同义词：spectator, viewer, watcher, looker
3. testimony by word or deed to your religious faith
4. (law) a person who attests to the genuineness of a document or signature by adding their own signature
   同义词：attestant, attestor, attestator
5. (law) a person who testifies under oath in a court of law

动词 witness:

1. be a witness to
2. perceive or be contemporaneous with
   同义词：find, see

1. Let the witness be sworn in.
   让证人宣誓作证。
2. He was not an impartial witness because of his affinity with the accused.
   他不是公正的见证人，因为他与被告有姻亲关系。
3. He is a key witness in this case.
   在这个案件中，他是一个主要见证人。
4. Before giving evidence the witness had to take an oath.
   证人作证前要先宣誓。
5. In my submission, the witness is lying.
   本人认为证人所言不实
6. Did anyone witness the traffic accident?
   有谁目击了这场交通事故？
7. Police have appealed for witnesses to come forward.
   警方呼吁目击者挺身而出。

wit.ness

n.（名词）

One who can give a firsthand account of something seen, heard, or experienced:
目击者，见证人：能够给出有关看到、听到或经历的事件的第一手描述的人：
例句：
a witness to the accident.
事故的目击者

One who furnishes evidence.
证人：给出证据的人
Something that serves as evidence; a sign.
证据：可作证据的东西；迹象
Law
【法律】
One who is called on to testify before a court.
证人：被传到法庭上作证的人
One who is called on to be present at a transaction in order to attest to what takes place.
见证人：被召到某交易现场以证明所发生的事的人
One who signs one`s name to a document for the purpose of attesting to its authenticity.
保证人：在一文件上签字以保证其真实性的人
An attestation to a fact, a statement, or an event; testimony.
证言：对一个事实、陈述或事件的证明；证言
Witness A member of the Jehovah`s Witnesses.
Witness 耶和华见证会成员
v.（动词）
wit.nessed,wit.ness.ing,wit.ness.es
v.tr.（及物动词）

To be present at or have personal knowledge of.
出席或知道
To take note of; observe.
作记录；观察
To provide or serve as evidence of.See Synonyms at indicate
提供或作为…的证据参见 indicate
To testify to; bear witness.
作证；持有证据
To be the setting or site of:
经历：作为…场景或地点：
例句：
This old auditorium has witnessed many ceremonies.
这个古老的礼堂内举行过许多次典礼

To attest to the legality or authenticity of by signing one`s name to.
作为签署人：通过在…签名证明其合法性或真实性
v.intr.（不及物动词）
To furnish or serve as evidence; testify.
作证，证明：提供证据，作为证据；作证
To testify to one`s religious beliefs.
见证：证明自己的宗教信仰

来源：
Middle English
中古英语
from Old English
源自 古英语
from wit [knowledge] * see wit
源自 wit [知识] *参见 wit

【引伸】
wit.nesser
n.（名词）