"vow" in the noun sense
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"
"vow" in the verb sense
make a vow promise
"He vowed never to drink alcohol again"
2. vow, consecrate
dedicate to a deity by a vow
Source: WordNet® (An amazing lexical database of English)
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