oath
nounUK /əʊθ/
US /oʊθ/
A serious promise that you will do something or tell the truth.
The new president took an oath to protect the country.
RELATED WORDS
OTHER MEANINGS
2. A formal swear word used to show strong anger.
He muttered an oath under his breath when he dropped the box.
3. A solemn appeal to God or a sacred thing to witness a promise.
The witness gave her oath on the Bible before speaking.
4. A curse or profanity.
The old sailor let out a string of oaths when the rope snapped.