somniferou (noun) somnifacient: soporific
Sinonime: anesthetic,
balmy,
calming, deadening, dozy, drowsy,
dull,
hypnotic, mesmerizing, narcotic, nodding, numbing, opiate, quietening, sedative, slumberous, snoozy, somniferous,
somnolent,
soothing, tranquilizing