1. past tense of swear; used profane or offensive language
2. past tense of swear; made a solemn promise or oath
3. past tense of swear; stated or declared emphatically

Examples

• He swore loudly when he hit his thumb with the hammer.
• She swore never to speak to him again after their argument.
• The witness swore to tell the truth in court.
• I swore an oath of allegiance to my country.
• He swore that he had locked the door before leaving.
• The sailor swore colorfully at the storm.
• She swore on her mother’s grave that she was innocent.