soporific
sop-uh-RIF-ikadjMeaning causing sleep or drowsiness
Memory hook SOUP-orific: soup that makes you SLEEPY. Nana Lou’s warm soup is so soothing that after one bowl, Grandpa and Kai both nod off at the table: the soup is soporific.
The speaker’s soporific voice put half the class to sleep.
In context The gentle rain on the roof had a soporific effect; within minutes of lying down, every camper in the tent was fast asleep.
Similar sleep-inducing, sedative, dull
Opposite stimulating, invigorating, exciting
From Latin sopor (deep sleep) + -fic (making).