銜環 [衔环]

Jyutping haam4 waan4
Pinyin xián huán

Definitions (Wiktionary)
  1. verb, figuratively, literary
    to repay a debt (of kindness etc.)
Examples (Wiktionary)
  1. Mandarin
    朕当结草衔环，报酬师父恩也。
    朕當結草銜環，報酬師父恩也。
    zhèn dāng jié cǎo xián huán ， bào chóu shī fù ēn yě ．
    • I must repay this debt of kindness, in order to show my gratitude to you.