Translation of "несерьёзно" in English

Это несерьёзно.

- It's not serious.
- It isn't serious.

слишком легкомысленно и несерьёзно.

is somehow too lightweight to be taken seriously.

- Это несерьёзно.
- Ничего серьёзного.

It's nothing serious.

Ты несерьёзно к этому относишься.

You're not taking this seriously.

Том несерьёзно относится к своей учебе.

- Tom is not serious about his studies.
- Tom isn't serious about his studies.

Это несерьёзно, я не в обиде на него.

- It's not serious, I don't bear him a grudge.
- It's nothing serious. I don't bear him a grudge.

- Мы не думаем, что это серьёзно.
- Мы думаем, что это несерьёзно.

We don't think it's serious.

Жизнь похожа на коробок спичек. Обращаться с ней серьёзно — глупо. Обращаться несерьёзно — опасно.

- Life is as a box of matches. Treating it cautiously is foolish, not treating it cautiously is dangerous.
- Life is like a box of matches - treating it too seriously is stupid, whereas being careless with it is dangerous.