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proving

Today it means: Experimentation to determine which substances cause which effects when ingested. Full definition →

Middle English provyng

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proving · verb¹

Middle English · inherited fromprovyng
English todayproving

From Middle English provyng, pryvynge, equivalent to prove + -ing.

proving · noun²

Old English · inherited from*prōfung
Middle English · inherited fromprovyng
English todayproving

From Middle English provyng, prevyng, provynge, prevynge, preovyng, prufunge, preofunge, from Old English *prōfung, equivalent to prove + -ing.

Etymology from Wiktionary, CC BY-SA 4.0.