I. adjective see: somnolent Date: 1665 1. causing or tending to cause sleep , tending to dull awareness or alertness, of, relating to, or marked by sleepiness or lethargy, II. noun Date: circa 1727 a ~ agent
SOPORIFIC
Meaning of SOPORIFIC in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012