to  lay  a  finger on  somebody or something
lay
leɪ
lei
a
ə
ē
<abbr style="text-decoration: underline;" title="finger / hand" > finger</abbr>
fɪngə
fingē
on
ɒn
on
somebody or something

Definition & Meaning of "lay a finger on somebody or something "in English

to lay a finger on somebody or something
01

to try to hurt a person physically or damage something in any slight way 

Idiom
Informal

What is the origin of the idiom "lay a finger on someone" and when to use it?

The idiom "lay a finger on someone", while not having a specific historical origin, is based on the literal idea of using one's hands or fingers to cause harm. This expression has been a part of the English language for many years, emphasizing the idea of causing harm or injury through physical contact.

Examples
He was so angry, but he didn't lay a finger on his opponent, choosing to resolve the conflict peacefully. 
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