To cause to be gooey or gummy, especially with the effect of obstructing the operation of some mechanism or process.
To make non-functional; to interfere with or put into a state of disorder; to ruin.
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.