bez troski in English:

The loss resulting from careless work is very serious.

The car crashed because the driver was careless.

a careless driver

Only one careless mistake cost the company millions of dollars.

Careless as she was, she could never pass an examination.

Tatoeba: Where nothing ruins a passionate night of sentence-making like a poorly placed comma or, even worse, a careless typo.

My mother told me to do a careless job of it.

Keeping Mario in a state in which he can throw fireballs is a delicate process; that newfound power sometimes makes one cocky and careless.

Confused by her careless mistake, she burst into tears.

We shall never agree on such a careless plan.

not taking or ​showing enough ​care and ​attention: My son's ​teacher says that his ​work is often ​rather careless.

Don't be so careless about/with spelling. / a careless driver / She gave a careless shrug.

She was careless with money, so now she's in trouble financially.

If you weren't careless, your word processor wouldn't break down.

Mr Johnson was concerned about the amount of money that was being lost because of careless management.

Norman was such a carefree man. He never worried about anything and was always relaxed.

She is carefree.

a carefree child

Children are usually more carefree than adults.

I want to live a carefree life in the country.

Children should grow up carefree.

Would my son’s really relaxed and carefree nature become fearful and withdrawn?

a carefree childhood I wish I was on my gap year again - I miss those carefree days, not having to worry about paying the mortgage or getting to work on time.

Norman was such a carefree man.

I remember my carefree student days.

I can't wait for my holiday so I can be as carefree as possible.

having no ​problems or not being ​worried about anything: I ​remember my carefree ​student ​days.

He is carefree - he has no problems or worries.

I loved those days, so carefree and enjoyable.

My mother is carefree, cheerful and good-natured.