1. Utter obscenities or profanities
   - curse, cuss, blaspheme, imprecate, eff and blind [Brit], eff [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: swore, sworn, swears, swearing

See also: swear off, swearer, swearing

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

Encyclopedia: Swear

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