1. to reject, renounce, or promise to give up something (often solemnly or under oath)
Usage: third-person singular present tense of 'foreswear'; formal or literary register
2. to swear falsely; to commit perjury
Usage: archaic or legal; third-person singular present tense of 'foreswear'

Examples

• She foreswears all claims to the inheritance.
• He foreswears violence and commits to peaceful protest.
• The athlete foreswears performance-enhancing drugs.
• They foreswear their former allegiances.
• The witness foreswears the truth in court.
• She foreswears luxury to live a simple life.