E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Nepenthe (3 syl.) or Nepenths,
a drug to drive away care and superinduce love. Polydamna, wife of Thonis (or Thone, 1 syl.), King of Egypt, gave nepenthe to Helen (daughter of Jove and Leda). Homer speaks of a magic potion called nepenth, which made persons forget their woes. (Odyssey, iv. 228.)