Learn English – An idiom meaning someone’s doing something useless and has no result at the end

idiomsphrase-requests

In my native language, we use an idiom to warn someone that they're doing something which has no result at the end:

Trying to convince him is like squashing water …

Is there any idiom in English with the same meaning?

Best Answer

There are a few idioms like that. One is:

You're just beating your head against the wall.

another is

Like trying to squeeze blood from a turnip.

and another is:

It's like trying to herd cats.

They each are used is slightly different situations. To be most analogous to your expression it sounds like I'd use the first one: Trying to convince him is like beating your head against the wall

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