I. -fik, -fēk adjective
Etymology: probably from French soporifique, from Latin sopor + French -ifique -ific
1. : causing or tending to cause sleep
a soporific drug
a soporific speech
2. : of, relating to, or characterized by sleepiness or lethargy
soporific old men
soporific symptoms
3. : tending to dull or deaden awareness or alertness
II. noun
( -s )
: something that is soporific
the soporific of peace and prosperity — Peter Eckstein
specifically : a sleep-inducing drug or medicament