moil in WordNet English dictionary

1. be agitated
   "the sea was churning in the storm"
   churn  boil  moil  roil 
   
2. work hard
   "She was digging away at her math homework"; "Lexicographers drudge all day long"
   labor  labour  toil  fag  travail  grind  drudge  dig  moil 
   
3. moisten or soil
   "Her tears moiled the letter"
   moil