Whether it's a medication or a boring lecture, something somniferous makes you sleepy.

Like soporific, somniferous is a word used to describe something that puts you to sleep. Some people who have trouble snoozing take pills that are somniferous: sleeping pills. Others do somniferous things, like reading before bed or counting sheep. A bad public speaker can be really somniferous, and so can a boring movie. Anything somniferous makes you want to catch some Z's.

Definitions of somniferous

adj sleep inducing

hypnagogic, hypnogogic, somnific, soporiferous, soporific
capable of depressing physiological or psychological activity or response by a chemical agent

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