friction

/ˈfrik-shən/

earlier, therapeutic rubbing of the limbs, from Middle French, from Latin friction-, frictio, from fricare to rub; akin to Latin friare to crumble, and perhaps to Sanskrit bhrīṇanti they injure

noun

  1. the rubbing of one body against another

  2. the force that resists relative motion between two bodies in contact

  3. the clashing between two persons or parties of opposed views : disagreement

the friction of sandpaper on wood

oil in a car engine reduces friction

noun

  1. a clutch in which connection is made through sliding friction

noun

  1. a power-transmission system that transmits motion by surface friction instead of teeth