friction
fric.tion \'frik-sh*n\ \-l*s\ n [MF or L; MF, fr. L friction-, frictio, fr. frictus, pp. of (Xfricare to rub; akin to L friare to crumble, Skt bhri-nc~anti they injure 1a: the rubbing of one body against another 1b: resistance to relative motion between two bodies in contact 2: the clashing between two persons or parties of opposed views : DISA GREEMENT - fric.tion.less aj