a solemn appeal to a deity, or to some revered person or thing, to witness one's determination to speak the truth, to keep a promise, etc.

to testify upon oath.

a statement or promise strengthened by such an appeal.

a formally affirmed statement or promise accepted as an equivalent of an appeal to a deity or to a revered person or thing; affirmation.

the form of words in which such a statement or promise is made.

an irreverent or blasphemous use of the name of God or anything sacred.

any profane expression; curse; swearword

He slammed the door with a muttered oath.

take an oath

to swear solemnly; vow.

noun

break , kindness , pleasantry

noun

adjuration , affidavit , affirmation , avowal , bond , contract , deposition , pledge , profession , sworn declaration , sworn statement , testimony , vow , word , word of honor , blasphemy , cuss , cuss word , dirty name , dirty word * , expletive , four-letter word * , imprecation , malediction , no-no , profanity , strong language , swearword , curse , epithet , appeal , attestation , conjuration , execration , fealty , hippocratic , homage , objurgation , obligation , promise , swear , swearing , sworn promise