Are These Really Common Russian Idioms

This site claims that these are some well-knowen russian idioms. Is that correct?

Well-known Russian idioms | Russia Beyond The Headlines

Thank you.

Yes, they are known by everybody.

"Как об стенку горох" -- usually it's "как об стенку горохом", in my experience.

"Набра́ть в рот воды" -- the word order is a bit off. In the idiom it's usually "воды в рот набрать" or "в рот воды набрать".

But yes, all of them are very common.

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Originally Posted by E-learner

"Как об стенку горох" -- usually it's "как об стенку горохом", in my experience.

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Quite the opposite, according to my experience :)

Мне кажется или диктор подкаста произносит букву "с" как-то... чересчур?)

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Originally Posted by Vanstraiten

Мне кажется или диктор подкаста произносит букву "с" как-то... чересчур?)

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Nope, it's fine. But the microphone's quality might have been better. And there was little need to read each and every sentence with such an exaggerated intonation.