to unfasten and take (something) apart

disconnect, cut off

to take (two things) apart

take apart; uncouple

to cause (one machine part) to become detached

free from connection

to refuse to associate oneself / a person with, support, a person, idea etc

part company with; separate

(to cause something) to become loose or looser

unbind

(of hair) loose, not tied; (of a book) without a cover

undo

of undo

open

to untie, unfasten, loosen (knots, buttons etc); to destroy (something good) and bring back the (bad) state of affairs that existed before

open

to remove a screw or screws from (something)

set free; unbind