vow
🇺🇸
/vaʊ/
🇬🇧
/vaʊ/
to make a serious promise to do something
They vow to always help each other.
他们发誓要永远互相帮助。
a serious promise to do something, often in religion
The monk made a vow to live simply.
这位僧人立誓要过简朴的生活。