To disengage (a device that restrains).
To make loose.
To free from restraint; to set at liberty.
To become unfastened or undone.
To relieve (the bowels) from constipation; to promote defecation.
To become loose.
To remove or clear a block or obstruction from.
In whist, to throw away a high card so as not to interrupt one's partner's long suit.
To free or make available.
To enable communication again, via telephone, instant messaging, etc., with (somebody previously blocked).
The removal of a block or blockage.