bind (v.), past form bound
pledge, vow, be under obligation
AW II.ii.52[Countess to Clown] you would answer very well to a whipping, if you were but bound to't [i.e. bound on oath to answer; also: bound to a whipping-post]
KL I.ii.2[Edmund alone, of Nature] to thy law / My services are bound
SHAKESPEARE'S WORDS © 2018 DAVID CRYSTAL & BEN CRYSTAL