How to say "bad, foolish, unhealthy" in Russian?

Дурной

"bad, foolish, unhealthy" is Дурной in Russian.

Дурной means "bad, foolish, unhealthy" in English.

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Word #3238 of 4,000 by frequency in Russian — level B2.

Example

Не слушай его, это дурной совет.

Don't listen to him, that's bad advice.