soporiferous

Definitions of soporiferous
1

adj sleep inducing

Synonyms:
hypnagogic, hypnogogic, somniferous, somnific, soporific
depressant
capable of depressing physiological or psychological activity or response by a chemical agent

adj inducing mental lethargy

Synonyms:
narcotic, soporific
uninteresting
arousing no interest or attention or curiosity or excitement

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.