許諾

许诺
xǔnuò
to promise; to pledge

CEDICT

to promise; to make a promise

Wiktionary

答應。

重編國語辭典

Entry Composition

1 許 xǔ
  1. to allow
  2. to permit
  3. to promise
  4. to praise
  5. somewhat
  6. perhaps
2 諾 nuò
  1. to consent
  2. to promise
  3. (literary) yes!