WordWeb Online

1. Utter obscenities or profanities
   "The drunken men were swearing loudly in the street";
   - curse, cuss [informal], blaspheme, imprecate, eff [Brit, informal], eff and blind [Brit]
    
2. To declare or affirm solemnly and formally as true
   "Before God I swear I am innocent";
   - affirm, verify, assert, avow, aver
    
3. Promise solemnly; take an oath
    
4. Make a deposition; declare under oath
   - depose, depone
    
5. Have faith or confidence in
   - count, bet, depend, rely, bank, look, calculate, reckon

Derived forms: swears, swearing, swore, sworn

See also: swear off [informal]

Type of: declare, express, give tongue to, pronounce, trust, utter, verbalise [Brit], verbalize, vow

Encyclopedia: Swear