spōnsiō ōnis, f
spondeo, a solemn promise, engagement, covenant, guarantee, security : voti sponsio, quā obligamur deo: per indutias sponsionem faciunt, uti, etc., made a covenant , S.: pax per sponsionem facta, by giving security , L.: sponsionem interponere, L.—In actions at law, a wager of law, formal stipulation for a forfeit by the loser : condicio fertur, ut, si id factum negaret, sponsione defenderet sese, L.: ut sponsionem facere possent, ni adversus edictum praetoris vis facta esset, an engagement to pay forfeit, unless it is adjudged that , etc.: sponsio est, ni te Apronius socium in decumis esse dicat, the stipulation is (to pay) unless , etc.: vincere sponsionem, to win the forfeit.—A betting : audax, Iu.