proven
/ˈpɹu.vn̩/ adjective B2- Having been proved; having proved its value or truth. · It's a proven fact that morphine is a more effective painkiller than acetaminophen is.· Mass lexical comparison is not a proven method for demonstrating relationships between languages.
From the library
Eradicating urban foxes has proven to be an exercise in futility, as vacant territories are rapidly claimed by transient individuals.
We question relentlessly if the acclaimed historical drama might have proven far more intellectually stimulating than the predictable domestic comedy we ultimately selected.
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