vow

noun

• a solemn promise.
• (vows) a set of promises committing one to a prescribed role, calling, or course of action, typically to marriage or a monastic career.

verb

• 1 [reporting verb] solemnly promise to do a specified thing: [with clause]:he vowed that his government would not tolerate a repeat of the disorder [with direct speech]:one fan vowed, “I’ll picket every home game.”

• 2 [with object] archaic dedicate to someone or something, especially a deity:I vowed myself to this enterprise