sure-fire adj : certain to be successful; "a sure-fire way to get rich"

English

Adjective

1. certain to work

   That hat should be a sure-fire way to spot him in a crowd.

assured of success, calculable, certain, coming, crowned with success, dependable, faithful, faithworthy, fast, firm, fortunate, invincible, made, on the up-and-up, on top, out in front, predictable, prosperous, reliable, secure, solid, sound, stable, staunch, steadfast, steady, substantial, succeeding, successful, sure, triumphant, trustworthy, trusty, unfailing, well-founded, well-grounded