avow

v. t.

  1. To declare openly, as something believed to be right; to own or acknowledge frankly; as, a man avows his principles or his crimes.
  2. To acknowledge and justify, as an act done. See Avowry.

n.

  1. Avowal.
  2. To bind, or to devote, by a vow.
  3. A vow or determination.