Unloosen and Unfasten

Unloosen verb - To set free (from a state of being held in check).

Unfasten is a synonym for unloosen in tighten topic. In some cases you can use "Unfasten" instead a verb "Unloosen", when it comes to topics like undo.

Unfasten verb - To disengage the knotted parts of.

Unloosen is a synonym for unfasten in tighten topic. You can use "Unloosen" instead a verb "Unfasten", if it concerns topics such as disengage.

Nearby Word: unfastening