Was heißt »abbinden« auf Englisch?

Das Verb abbinden lässt sich wie folgt von Deutsch auf Englisch übersetzen:

Deutsch/Englische Beispielübersetzungen

abklemmen:: pinch off
ablegen:: lay down; put down
abmachen:: remove; take off
abnehmen:: amputate; answer; believe; buy; confiscate; decrease; dwindle; lessen; lose; play the string game; purchase; receive; remove; steal; take away; take down; take off; take over; test; wane
abschnüren:: choke; cut off; have a stranglehold (L=E); ruin; strangulate
abstreifen:: slip off; wipe
abziehen:: withdraw
andicken:: thicken
aushärten:: age; cure; harden; temper
ausziehen:: draw; extract; pull (pull out)
binden:: tie
entfernen:: delete; deprive; detach; extirpate; remove
erstarren:: congeal
festigen:: stabilize; strengthen
isolieren:: insulate; isolate
legieren:: alloy
lösen:: buy; defecate; detach; disjoin; dissolve; solve
losmachen:: available; be off; cast off; depart; detach; free; get a move on; get started; hurry up; kick off; loosen; set off; shake a leg; take off; unfasten; unfix; unhitch; unhook; unlace; unloose; unmoor; unsnare; untack; untether
schnüren:: string; tie
trennen:: separate
verbinden:: bandage
verdicken:: thicken
verhärten:: harden
verschließen:: close; lock
zusammenziehen:: contract; shrink

"What is done, we must undo!" cried Tom, opening the door to the secret passageway that led to his time machine.
It's hard to undo decades of social programming.
Tom slid his hands round her back to undo her bra.
Just undo the button.
I wish I could undo the injustice that has occurred. Unfortunately, that is not possible.
Tom started to untie his shoes.
Can you untie this knot?
We have to undo what was done.
I can't untie this knot.
I can't undo it.