How to say "stupidly, it's silly" in Russian?

Глупо

"stupidly, it's silly" is Глупо in Russian.

Глупо means "stupidly, it's silly" in English.

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Word #2427 of 4,000 by frequency in Russian — level B2.

Example

Было бы глупо отказаться от такого предложения.

It would be silly to refuse such an offer.