fray
     n : a noisy fight [syn: {affray}, {disturbance}, {ruffle}]
     v 1: wear away by rubbing; "The friction frayed the sleeve" [syn:
           {frazzle}]
     2: cause friction; "my sweater scratches" [syn: {rub}, {fret},
        {chafe}, {scratch}]
Source: WordNet® 2.0