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

     v 1: utter obscenities or profanities; "The drunken men were
          cursing loudly in the street" [syn: curse, cuss, blaspheme,
     2: to declare or affirm as true: "Before God I swear I am
        innocent." [syn: affirm, assert, avow, aver, swan]
     3: promise solemnly; take an oath
     4:  make a deposition; declare under oath [syn: depose, depone]
     5: 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" [syn: trust, rely, bank]
        [ant: distrust, distrust]