root [root]\n\n(past root·ed, past participle root·ed, present participle root·ing, 3rd person present singular roots) \n\n1.  support somebody or something noisily:\n\n to cheer, shout, or applaud in support of a contestant or team \n \n2.  lend support to somebody: \n\nto provide support to or be actively in favor of somebody or something  \n\n\n[Late 19th century. Origin uncertain: perhaps an alteration of rout “to low loudly.”]