Untie or unfasten.

Roget 750: liberate, free; set free, set clear, set at liberty; render free, emancipate, release; enfranchise, affranchise^†; manumit; enlarge; disband, discharge, disenthrall, disenthral, dismiss; let go, let loose, loose, let out, let slip; cast adrift, turn adrift; deliver etc. 672; absolve etc. (acquit) 970.    unfetter etc. 751, untie etc. 43; loose etc. (disjoin) 44; loosen, relax; unbolt, unbar, unclose, uncork, unclog, unhand, unbind, unchain, unharness, unleash; disengage, disentangle; clear, extricate, unloose.    gain one's liberty, obtain one's liberty, acquire one's liberty etc. 748; get rid of, get clear of; deliver oneself from; shake off the yoke, slip the collar; break loose, break prison; tear asunder one's bonds, cast off trammels; escape etc. 671.    ... show more

Roget 44: be disjoined &c.; come off, fall off, come to pieces, fall to pieces; peel off; get loose.    disjoin, disconnect, disengage, disunite, dissociate, dispair^†; divorce, part, dispart^†, detach, separate, cut off, rescind, segregate; set apart, keep apart; insulate, isolate; throw out of gear; cut adrift; loose; unloose, undo, unbind, unchain, unlock etc. (fix) 43, unpack, unravel; disentangle; set free etc. (liberate) 750.    sunder, divide, subdivide, sever, dissever, abscind^†; circumcise; cut; incide^†, incise; saw, snip, nib, nip, cleave, rive, rend, slit, split, splinter, chip, crack, snap, break, tear, burst; rend &c., rend asunder, rend in twain; wrench, rupture, shatter, shiver, cranch^†, crunch, craunch^†, chop; cut up, rip up; hack, hew, slash; whittle; haggle, hackle, discind^†, lacerate, scamble^†, mangle, gash, hash, slice.    cut up, carve, dissect, anatomize; dislimb^†; take to pieces, pull to pieces, pick to pieces, tear to pieces; tear to tatters, tear piecemeal, tear limb from limb; divellicate^†; skin etc. 226; disintegrate, dismember, disbranch^†, disband; disperse etc. 73; dislocate, disjoint; break up; mince; comminute etc. (pulverize) 330; apportion etc. 786.    part, part company; separate, leave.    ... show more

Dutch: losbinden, ontbinden