Synonyms: narcotic, soporiferous, soporific
Definition: inducing mental lethargy
Usage: a narcotic speech
Similar words: uninteresting
Definition: arousing no interest or attention or curiosity or excitement
Usage: a very uninteresting account of her trip
Synonyms: hypnagogic, hypnogogic, somniferous, somnific, soporiferous, soporific
Definition: sleep inducing
Similar words: depressant
Definition: capable of depressing physiological or psychological activity or response by a chemical agent