1. a person who uses profane or vulgar language habitually
Usage: informal
2. a person who takes an oath or makes a sworn statement
Usage: formal; legal

Examples

• He was known as a terrible swearer who couldn’t speak without using bad language.
• The coach tried to control his temper and avoid being such a swearer around the young players.
• As the swearer in the court case, she had to tell the truth under penalty of perjury.
• Each swearer must raise their right hand before taking the oath of office.
• The witness was the primary swearer in the affidavit.
• Despite his reputation as a swearer, he cleaned up his language at family gatherings.