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soporiferous

[sop-uh-rif-er-uh s, soh-puh-] /ˌsɒp əˈrɪf ər əs, ˌsoʊ pə-/
adjective
1.
bringing sleep; soporific.
Origin
1580-1590
1580-90; < Latin sopōrifer (sopōr-, combining form of sopor sopor + -i- -i- + -fer -fer) + -ous
Related forms
soporiferously, adverb
soporiferousness, noun
unsoporiferous, adjective
unsoporiferously, adverb
unsoporiferousness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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