vow
verbverb Verb Forms present simple I / you / we / they vow he / she / it vows past simple vowed -ing form vowing
jump to other results to make a formal and serious promise to do something or a formal statement that is true vow to do something She vowed never to speak to him again. vow (that)… He vowed (that) he had not hurt her. vow something They vowed eternal friendship. + speech “I'll be back,” she vowed.
See vow in the Oxford Advanced Learner's Dictionary