1
- a solemn promise誓言。
1.1
vows
a set of such promises committing one to a prescribed role, calling, or course of action, typically to marriage or a monastic career（尤指为婚姻或僧侣生涯立下的）誓约。
1
- reporting verb solemnly promise to do a specified thing宣誓, 立誓, 发誓：
with clause he vowed that his government would not tolerate a repeat of the disorder他郑重宣告他的政府绝对不能容许再次发生混乱
with direct speech one fan vowed, 'I'll picket every home game'.一个球迷发誓说：“我一定要为每一次主场比赛当纠察”。
2
- with obj. archaic dedicate to someone or something, especially a deity〈古〉（尤指对神）立誓奉献：
I vowed myself to this enterprise.
我立誓终身为这事业服务。
词源
Middle English: from Old French vou, from Latin votum （see VOTE）; the verb from Old French vouer.