proven
adj.adj. shown to be true or real by using facts or evidence. You use this to describe something that people have tested and found to be successful.
adj. demonstrated to be true, valid, or effective through evidence or experience. Often functions as a past participle used attributively before a noun.
This is a proven method for losing weight.
The company only hires managers with a proven track record of increasing sales in competitive markets.
While the theory remains controversial among academics, its practical applications have yielded proven results in industrial settings for over a decade.
From Scottish English, as past participle of preve, a Middle English variant of prove – compare woven (from weave) and cloven (from cleave), both of which feature -eve → -oven. Preve died out in England, but survived in Scotland, where proven developed, initially in a legal context, as in “The jury ruled that the charges were not proven.” See usage notes for historical usage patterns. Earlier, from Late Latin probō (“test, try, examine, approve, show to be good or fit, prove”, verb), from Latin probus (“good, worthy, excellent”), from Proto-Indo-European pro-bʰuH-s (“being in front, prominent”), from pro-, per- (“toward”) + bʰuH- (“to be”). Morphologically prove + -n.
Commonly used as an adjective before a noun, such as 'proven track record' or 'proven ability'.
a proved methoda proven methodWhile 'proved' is the standard past participle of 'prove', 'proven' is the preferred form when used as an adjective before a noun.