make a vow; promise; "He vowed never to drink alcohol again"誓いを立てる誓う
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"何かを行う、またはある態度で振る舞うという心からの誓約(自分自身への、別の者への、または神への)誓い