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1. Make a solemn pledge or promise
   "He vowed never to drink alcohol again"
    
2. Dedicate to a deity by a vow
   - consecrate

1. A solemn pledge (to oneself or to another or to a deity) to do something or to behave in a certain manner
   "they took vows of poverty"

Derived forms: vowed, vows, vowing

Type of: assurance, commit, consecrate, dedicate, devote, give, pledge, plight [archaic]

Encyclopedia: Vow