What is another word for unfasten?

Here are some words that can be used as synonyms for "unfasten," depending on the context:

General:

* Release

* Loosen

* Open

* Detach

* Disconnect

* Untie

* Undo

* Unhook

More specific:

* Unbutton (for clothing)

* Unzip (for clothing)

* Unbuckle (for belts, buckles)

* Unscrew (for screws)

* Unclip (for clips)

* Unlatch (for latches)

* Unchain (for chains)

The best synonym to use will depend on the specific object being unfastened and the context of the sentence.