Learn English – a word like “negate” but even worse

single-word-requestssynonyms

I suspect this is going to be a "oh yeah, duh" moment, but I'm looking for a word that is like "negate," but worse. Here's an example sentence:

I could cram for this test all night, but the sleep deprivation I'd experience could negate the effort.

I believe this sentence means, "cramming for the test could be canceled out by the sleep deprivation." But what I really want to say is, "the negatives of sleep deprivation could be worse than the benefits of cramming.

Is there a word with the latter meaning that could be swapped out for negate in the example sentence?

EDIT: I probably wasn't clear because a lot of the answers are giving me stronger words with the same meaning of "negate." But I'm looking for a word with a different, yet related, meaning.

May be tagging it with synonyms because the confusion. But whenever I look up synonyms in a thesaurus, the list includes words with closely related meanings, too.

Negate, nullify, void, etc. can be interpreted as bringing you back to zero. I'm not looking for that, I'm looking for a word that fits the first example and means net negative.

Best Answer

I think outweigh conveys the right meaning here

To be more significant than; exceed in value or importance

e.g. "The benefits outweigh the risks."

The sentence in the question would be

I could cram for this test all night, but the sleep deprivation I'd experience could outweigh the effort.

A synonym that also works here is "outbalance", but that's much less commonly used.