"To był największy stres w moim życiu."

Translation: It was the biggest stress in my life.

[bestllama]

That sounds wrong/unnatural to me. "Most stressful situation" sounds fine, but not quite an exact translation

[perrin917693]

Would this also translate to "this was the most stress in my life"?

[Jellei]

OK, it can work. Added.

[Ailsa576750]

'the greatest stress' was marked as wrong, but is actually much more natural on my (English) tongue than 'the biggest stress'. This happens in several exercises in various contexts.

[alik1989]

'Greatest stress' is accepted. Furthermore, there are no reports containing 'greastest', so I guess you didn't send one.

A according to the iweb corpus, 'the greatest stress' occurs about 30% more often than 'the biggest stress', so saying that's it's much more natural is a bit of an exaggeration.

[Mark_B420]

I used "highest" stress, which should work. A high stress Job sounds more natural than a big stress job.

[alik1989]

I'm on board with "high-stress job", "high-stress situation", "high stress levels", etc. but without an additional noun? I don't think so. Anyway, the main translation isn't much better either, so I decided to replace this sentence.