Lethe

 
Pronunciation: /ˈliːθi/
Greek Mythology
  • a river in Hades whose water when drunk made the souls of the dead forget their life on earth.

Derivatives

Lethean

Pronunciation: /liːˈθiːən/
adjective

Origin:

via Latin from Greek lēthē 'forgetfulness', from the base of lanthanesthai 'forget'