oath

(noun) profane or obscene expression usually of surprise or anger. Synonyms: curse, curse word, expletive, swearing, swearword, cuss. Example: "Expletives were deleted."

(noun) a commitment to tell the truth (especially in a court of law); to lie under oath is to become subject to prosecution for perjury. Synonyms: swearing.

(noun) a solemn promise, usually invoking a divine witness, regarding your future acts or behavior. Example: "They took an oath of allegiance."