n.
Pronunciation: - ' ri-fik
Function: adjective
Etymology: probably from French soporifique, from Latin sopor deep sleep; akin to Latin somnus sleep ― more at SOMNOLENT
Date: 1665
1 a : causing or tending to cause sleep < soporific drugs> b : tending to dull awareness or alertness
2 : of, relating to, or marked by sleepiness or lethargy