proof
adjective/pruːf/
/pruːf/
- proof against something (formal) that can resist the damaging or harmful effects of something
- The sea wall was not proof against the strength of the waves.
- (in compounds) that can resist or protect against the thing mentioned
- rainproof/windproof clothing
- The car has childproof locks on the rear doors.
- an inflation-proof pension plan
Word OriginMiddle English preve, from Old French proeve, from late Latin proba, from Latin probare ‘to test, prove’. The change of vowel in late Middle English was due to the influence of prove. Current senses of the verb date from the late 19th cent.
Check pronunciation:
proof