time-tested
Synonym discussion
Sense: adjective/1
'Time-tested' stresses that something has earned trust through many years of successful use. 'Proven' is broader and can describe a person, an idea, or evidence, without highlighting long history. 'Tried-and-true' is close in meaning but more informal and more openly approving. 'Reliable' only says that something can be depended on; it does not necessarily suggest a long record behind that trust. A time-tested method has lasted through repeated real use, while a reliable tool may simply work well now.
Common collocations
Etymology
Formed in modern English from 'time' and 'tested', the word describes something that has shown its value by continuing to work well across many years rather than in a single short trial.
First known use
1821
1821, in the meaning defined above