somniferous

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UK/sɒmˈnɪfəɹəs/US/sɑmˈnɪfəɹəs/

adjective

causing or inducing sleep, normally with harmful overtones.

Similar
soporificsoporiferoussomnifichypnogogichypnagogicdepressant
OriginLatin somnifer →
Scrabble 16
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Meanings

adjectivesomniferous (comparative more somniferous, superlative most somniferous)

comparative more somniferous · superlative most somniferous

  1. medicinecausing or inducing sleep, normally with harmful overtones.

Synonyms & antonyms

adjectivesleep inducing

Similar
soporificsoporiferoussomnifichypnogogichypnagogicdepressant
Also see
depressantdrowsyhypnagogicsleepyslumberoussnoozysomnificsomnolentsoporiferoussoporific

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Latinsomnifer
  2. Englishsomniferous

From Latin somnifer + -ous, from somnus (“sleep”) + ferre (“to bring”).

More words from Latin

Full word history & related roots →

Rhymes & wordplay

Rhymes with somniferous

carboniferousseminiferouscruciferousmetalliferousfossiliferousodoriferousacetabuliferousacidiferousaeriferousaestiferousagatiferousalbuminiferousaliferousalkaliferousalumiferousaluminiferousamberiferousamentiferousammonitiferousamygdaliferousamyliferousanatiferousangeliferousantenniferous
All rhymes →
Cite this entry
APA

somniferous. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/somniferous

MLA

“somniferous.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/somniferous. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “somniferous,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/somniferous.

Source: somniferous on Wiktionary, CC BY-SA 4.0.