sworn
adjectiveUK /swɔːn/
US /swɔːrn/
Having made a serious promise to do something.
The sworn witness promised to tell the truth in court.
OTHER MEANINGS
2. Past participle of swear, meaning to make a serious promise.
She had sworn to keep the secret forever.
3. Bound by an oath to be loyal or faithful.
The soldiers were sworn to protect the king.
4. Declared or confirmed with an oath.
He gave a sworn statement to the police.
5. Having a strong, declared opposition to someone or something.
The two families are sworn enemies.