sure-fire

See also: surefire

English

Alternative forms

• surefire

Etymology

sure +‎ fire, originally used to denote the efficacy of firearms (rifles) to fire.

Adjective

sure-fire (comparative more sure-fire, superlative most sure-fire)

1. guaranteed to work

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

See also

• foolproof