vot-; vov-; vow
(Latin: affirm, wish, commit; to promise solemnly, to pledge, to dedicate)
2. To declare or to affirm solemnly and formally as true: "At the end of most wedding ceremonies, the couples make their vows, in which they avow their commitment to each other."
3. To acknowledge openly, boldly, and unashamedly.
To confess, or "to avow guilt" does NOT come from the same Latin source as vow (from Anglo-French and Old French vou) which comes from Latin votum, "a vow, a wish, a promise, a dedication".
Avow comes from Latin, vocare, "to call". From Old French avouer, "acknowledge, accept"; especially, as a protector, from Latin advocare.
2. A frank admission, statement, or acknowledgment of something "Jake's avowal that he didn't do anything wrong was proven to be untrue."
2. A frank admission or acknowledgment: "Carl admitted that he has an avowedly simple life style."
2. A person who claims to speak the truth.