swear on

swear on (third-person singular simple present swears on, present participle swearing on, simple past swore on, past participle sworn on)

1. Alternative form of swear upon

   swear on (someone's) grave [especially one's mother's grave]

   swear on (someone's) life [especially one's own or one's mother's life]

• swear on a stack of Bibles (swear on a stack)

• by God, by the rood

• seaworn