toil
     n : productive work (especially physical work done for wages);
         "his labor did not require a great deal of skill" [syn: {labor},
          {labour}]
     v : work hard; "She was digging away at her math homework";
         "Lexicographers drudge all day long" [syn: {labor}, {labour},
          {fag}, {travail}, {grind}, {drudge}, {dig}, {moil}]
Source: WordNet® 2.0