FRICTION

noun Etymology: earlier, therapeutic rubbing of the limbs, from Middle French, from Latin ~-, frictio, from fricare to rub; akin to Latin friare to crumble, and perhaps to Sanskrit bhrīṇanti they injure Date: 1704 1. the rubbing of one body against another, the force that resists relative motion between two bodies in contact, the clashing between two persons or parties of opposed views ; disagreement , sound produced by the movement of air through a narrow constriction in the mouth or glottis, ~less adjective ~lessly adverb