白ㄅㄞˊbái頭ㄊㄡˊtóu偕ㄒㄧㄝˊxié老ㄌㄠˇlǎo

  1. 形容夫妻恩愛到老。明·陸采《懷香記·第二三齣》：「孩兒，我與你母親白頭偕老，富貴雙全。」也作「白頭到老」。似白頭相守

閩透尾
英(to live together until the)​ white hairs of old age (idiom)​; to live to a ripe old age in conjugal bliss, until death do us part