ring-oath

noun

ring-oath

noun

1

An oath sworn upon a finger ring.

"The wall is growing apace," he said. "And we swore an unbreakable oath, a ring-oath and a weapon-oath, that if he finishes building his wall in time, we will give him the sun and the moon[.]"2017, Neil Gaiman, Norse Mythology, Bloomsbury Publishing, page 59:

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