名詞
事物出現、發生嘅原因;來源;源起;來歷 origin (of a certain event, story or legend)
呢個鬼故嘅由來原來係因為有人係廁所冇閂水喉。
呢个鬼故嘅由来原来系因为有人系厕所冇闩水喉。
ni1 go3 gwai2 gu2 ge3 jau4 loi4 jyun4 loi4 hai6 jan1 wai6 jau5 jan4 hai6 ci3 so2 mou5 saan1 seoi2 hau4. The origin of this ghost story is actually someone forgot to turn off the tap in the bathroom.
Definitions (Wiktionary)
noun
time since the beginning of the something (till now)