可数名词：

1.目击者；见证人

2.【律】证人；连署人

3.证据；证言

4.可作证据的人（或物）

及物动词：

1.目击；注意到

2.是发生...的地点（或时间）

3.为...作证；证明

4.为...作证；证明

5.作...的证人；在（文件）上签名作证，连署

不及物动词：

作证，证明；作为证据；作见证

词形变化

名称witnesser

时态witnessed，witnessing，witnesses

单词分析

这些动词均有“看”之意。

look侧重“看”的动作。

see指看见。

watch指用眼睛跟随某物，以便对每一个变化、运动等进行观察。

observe侧重以客观的态度进行观察。

witness指当场看见，亲眼看见。

英语解释

be a witness to

perceive or be contemporaneous with

(law) a person who testifies under oath in a court of law

testimony by word or deed to your religious faith

someone who sees an event and reports what happened

(law) a person who attests to the genuineness of a document or signature by adding their own signature

a close observer; someone who looks at something (such as an exhibition of some kind)