1vow 
/ˈvaʊ/ noun
plural vows /ˈvaʊ/ noun [count] : a serious promise to do something or to behave in a certain way
▪ The monks take a vow of silence/chastity/poverty. ▪ marriage/wedding vows ▪ The bride and groom exchanged vows. ▪ The mayor made a vow to reduce crime.
▪ The monks take a vow of silence/chastity/poverty. ▪ marriage/wedding vows ▪ The bride and groom exchanged vows. ▪ The mayor made a vow to reduce crime.
