Synonyms of 'do-or-die'
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a desperate rescue attempt
Something that is hazardous is dangerous, especially to people's health or safety.
Below decks was hazardous in very heavy weather.
If an activity or action is risky, it is dangerous or likely to fail.
It is a very risky business.
Thesaurus for do-or-die from the Collins English Thesaurus
to make a final or supreme effort