出典:Wiktionary
From Middle English provyng, pryvynge, equivalent to prove + -ing.
From Middle English provyng, prevyng, provynge, prevynge, preovyng, prufunge, preofunge, from 古期英語 *prōfung, equivalent to prove + -ing.
proving (複数形 provings)
「proving」は動詞「prove」の現在分詞です