I. |pər., |per+ adverb
Etymology: Middle English per aventure, from Old French per aventure, par aventure, from per, par by (from Latin per through, by) + aventure chance — more at for , adventure
archaic : perhaps , possibly
peradventure I will with you to the court — Shakespeare
it may peradventure be thought there was never such a time — Thomas Hobbes
II. noun
1. : a possibility of error or uncertainty : doubt , chance
the foregoing facts establish beyond peradventure the conclusion — E.H.Wilkins
put federal credit beyond peradventure of a doubt — B.M.Baruch
2. : an opinion based on guesswork : surmise
beyond the reach of peradventure — H.J.Laski