To free or unfasten.
I think that the tha antonym of affix is to unfasten, but I am not completely sure....
Detach, unlock, disconnect, unlink, loosen, unfasten, open, unchain, release...
"Quickly unfasten my seatbelt, I can't move!"
The word ' unfasten ' has 3 syllables : un-fas-ten
I could not unfasten my seat belt and had to ask for help from someone at the gas station. It is very difficult to unfasten a bracelet with one arm in a cast.
Fasten.
Since the building changed ownership, we had to unfasten the sign, and install a new one.
It means undo.
undo
Herman quickly worked to unfasten his apron from working in the smithy, so he could change for dinner.
THREE