Meaning of the word sure-fire in English

What does sure-fire mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

sure-fire

US /ˈʃʊr.faɪr/
UK /ˈʃʊə.faɪər/
"sure-fire" picture

Adjective

certain to succeed

Example:
Investing in that company is a sure-fire way to make money.
He has a sure-fire plan to win the competition.