intransitive (usually with of) and absol.

absol. or intransitive. To wager, bet.

transferred. absol. To warrant, ‘be bound’, assert confidently. Cf. borrow, n. 2b. Obsolete.

intransitive for reflexive (in senses 4 5). to engage for: to be answerable for, guarantee; later, to undertake to perform, to promise. Rarely in…