来らい由ゆ

noun

origin; cause; source

A somewhat formal or literary noun referring to the origin or cause of something, often used in written or explanatory contexts.

• この伝でん統とうの来らい由ゆを調しらべている。

  I am researching the origin of this tradition.

• 事じ件けんの来らい由ゆについて説せつ明めいを求もとめた。

  They demanded an explanation regarding the cause of the incident.