soporiferous

comparative more soporiferous · superlative most soporiferous

1. archaicsoporific, sleep-inducing

   At last the soporiferous fumes of the wine lulled him into a gentle repose.

   1910, Various, International Short Stories= French

   2 more examples

   And she poured from a golden urn, into a cup of the same metal, the sombre-coloured beverage which she had mingled with the soporiferous juice of the nepenthe.

   1908, Lafcadio Hearn, King Candaules

   All this I was told; for, while the whole operation was performing, I lay in a profound sleep, by the force of that soporiferous medicine infused into my liquor.

   1922, Charles Sylvester, Journeys Through Bookland, Vol. 5