A martyr (Greek: μάρτυς, mártys, "witness"; stem μάρτυρ-, mártyr-) is somebody who suffers persecution and/or death for advocating, renouncing, refusing to renounce, and/or refusing to advocate a belief or cause as demanded by an external party. This refusal to comply with the presented demands results in the punishment or execution of the martyr by the oppressor. Originally applied only to those who suffered for their religious beliefs, it is now often used also used for people imprisoned or executed for espousing a political cause.