ETYM Latin somnifer; somnus sleep + ferre to bring.
Causing or inducing sleep; soporific; bearing sleep.
ETYM Latin sopor a heavy sleep (akin to somnus sleep) + facere to make. Related to Somnolent, Fact.
Tending to produce sleep.
Sleep inducing; SYN. soporiferous, somniferous, somnific.
In a somniferous manner, in a manner which induces sleep
Without a sound, silently, quietly; in an unfathomable manner