surefire

[ shoo r-fahyuh r, shur- ]
/ ˈʃʊərˌfaɪər, ˈʃɜr- /

adjective

sure to work; foolproof: a surefire moneymaking scheme.

Origin of surefire

First recorded in 1915–20; sure + fire
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for sure-fire

British Dictionary definitions for sure-fire

sure-fire


adjective

(usually prenominal) informal certain to succeed or meet expectations; assured
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012