Meaning of the word "beat a dead horse" in English

What does "beat a dead horse" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

beat a dead horse

US /biːt ə dɛd hɔrs/
UK /biːt ə dɛd hɔrs/
"beat a dead horse" picture

Idiom

1.

to waste effort on something that is no longer possible or cannot be changed

Example:
Trying to convince him now is just beating a dead horse; he's made up his mind.
Let's move on to a new topic; we're just beating a dead horse with this argument.
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