The verb describes surfaces that gleam, glitter, or flash with reflected light—polished armor, sleek horses, brilliant complexions, water in motion. Classical poets speak of shields 'gleaming with oil' and white horses shining 'like swan feathers.' Mark employs this vivid term to describe Jesus' transfigured clothing as 'glistening, exceedingly white,' emphasizing supernatural radiance beyond any earthly bleaching. The present participle suggests ongoing, dynamic brilliance rather than static whiteness. The term captures both the visual intensity and the otherworldly quality of the transfiguration scene.