Cursing stones, known in Irish as clocha mallacht, are typically rounded or holed stones, often kept at holy wells or on ancient sites, which were turned or rotated with intent to bring harm upon an enemy. The act was understood as a kind of inverted prayer, and the stones themselves were frequently associated with early Christian saints whose blessing could, under sufficient provocation, be reversed. That duality, devotion curdling into imprecation, is what makes these objects so unsettling and so revealing about the texture of belief in early and medieval Ireland.

The practice of turning cursing stones was not considered lightly, even by those who used them. In many traditions, if the cause was deemed unjust, the curse was thought to rebound upon the person who turned the stone. This built-in moral weight gave the ritual a kind of self-regulating quality, and it also meant that the stones carried a reputation that outlasted formal religious sanction. Many were removed or destroyed by clergy in the eighteenth and nineteenth centuries, which makes those that survive all the more notable. The Kanrawer stone belongs to a landscape, the coastal parishes of Connemara and south County Galway, where such survivals are relatively concentrated, and where the overlap between pre-Christian practice and Christian devotion remained close to the surface for a very long time.