A state of incompatibility or disagreement.
A long, narrow crack or opening made by breaking or splitting, especially in rock or earth.
A groove, deep furrow, elongated cleft or tear between body parts or in the substance of an organ; a sulcus.
A break or slit in tissue usually at the junction of skin and mucous membrane.
To split, forming fissures.
The removal of a block or blockage.
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).