• a solemn promise

Synonyms: oath, pledge, promise, bond, covenant, commitment, avowal, profession, sworn statement, affirmation, attestation, assurance, word, word of honour, guarantee

• solemnly promise to do a specified thing

Synonyms: swear, swear/state under oath, swear on the Bible, take an oath, pledge, promise, affirm, avow, undertake, give an undertaking, engage, commit, commit oneself, make a commitment, give one's word, give one's word of honour, give an assurance, guarantee

• dedicate to someone or something, especially a deity