tar

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

     n 1: any of various dark heavy viscid substances obtained as a
          residue [syn: pitch]
     2: a man who serves as a sailor [syn: mariner, seaman, Jack-tar,
         old salt, seafarer, gob, sea dog]
     v 1: coat with tar, as of roofs
     2: cover with tar or asphalt, of roads [syn: asphalt]