vow

vt.

1. 發誓要（做）[+to-v][+（that）]
   I vowed never to reveal the secret.

   我發誓絕不洩漏這一祕密。

2. 鄭重宣告[+（that）]
   She vowed that she would take the matter to court.

   她鄭重宣布要把這事訴諸法律。

vi.

1. 發誓，許願
2. 鄭重宣告