WordWeb Online

1. Utter obscenities or profanities
   - curse, cuss, blaspheme, imprecate, eff [Brit], 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, swan
    
3. Promise solemnly; take an oath
    
4. Make a deposition; declare under oath
   - depose, depone
    
5. Have confidence or faith in
   "I swear by my grandmother's recipes"
   - trust, rely, bank

Derived forms: sworn, swore, swears, swearing

See also: swear off, swearer, swearing

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

Encyclopedia: Swear