rub


rub (http://definr.com/rub)

     n 1: an unforeseen obstacle [syn: hang-up, hitch, snag]
     2: the act of rubbing or wiping; "he gave the hood a quick rub"
        [syn: wipe]
     v 1: move over something with pressure; "rub my back"; "rub oil
          into her skin"
     2: cause friction; "my sweater scratches" [syn: fray, fret,
         chafe, scratch]
     3: scrape or rub as if to relieve itching; "Don't scratch your
        insect bites!" [syn: scratch, itch]