swear in WordNet English dictionary

1. to declare or affirm solemnly and formally as true
   "Before God I swear I am innocent"
   affirm  verify  assert  avow  aver  swan  swear 
   
2. have confidence or faith in
   "We can trust in God"; "Rely on your friends"; "bank on your good education"; "I swear by my grandmother's recipes"
   trust  swear  rely  bank 
   
3. utter obscenities or profanities
   "The drunken men were cursing loudly in the street"
   curse  cuss  blaspheme  swear  imprecate 
   
4. make a deposition; declare under oath
   swear  depose  depone 
   
5. promise solemnly; take an oath
   swear