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Sure-fire
adj
Definitions
Adjective
- 1 Guaranteed to work or happen.
"That hat should be a sure-fire way to spot him in a crowd."
Adjective
- 1 certain to be successful wordnet
Etymology
From sure + fire, originally used to denote the efficacy of firearms (rifles) to fire.
See also for "sure-fire"
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Unscramble this word: surefire