名詞
地名；傳説位於奈河或忘川上，喺中國民間神話嘅觀念裏面，呢度係送人轉世投胎嘅地點。晌呢度會有一位叫「孟婆」嘅神，每個鬼魂飲完佢畀嘅湯（「孟婆湯」）就會遺忘前世記憶，投胎到下一世。另一寫法裏面「奈何」二字取人類對生死「無可奈何」嘅意思。 Lethe Bridge. A bridge on Lethe in folklore religion. It is said that there is a god called Meng Po, who is the Lady of Forgetfulness. Once dead people walk over the bridge and have the soup from Meng Po, they will forget anything and born again.