1. [ verb ] to declare or affirm solemnly and formally as true
Synonyms: swear assert affirm swan verify aver

"Before God I swear I am innocent"

Related terms: declare declare hold declare assure claim attest protest avowal affirmation swearer affirmer
2. [ verb ] admit openly and bluntly; make no bones about
Synonyms: avouch
Related terms: disavow admit avower
Similar spelling:   avo