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soporiferous

soporiferous

1 9.9
Making someone feel very sleepy
  • adjective
  • /ˌsɒpəˈrɪfərəs/
  • Formal
: soporífero
  • The professor's soporiferous lecture nearly put the whole class to sleep.

Examples

  • The medication had a soporiferous effect, making her feel drowsy and unfocused.

  • The soporiferous effects of the tea made me sleepy.

  • After a large meal, he found the room's warm air to be particularly soporiferous.

  • This soporiferous lecture is boring.

  • After a large meal, he found the warm tea to be particularly soporiferous, making him feel drowsy.

  • The professor's soporiferous lecture kept all the students yawning and struggling to stay awake.

  • The soporiferous nature of the tranquil music helped her fall asleep quickly.

Synonyms

narcotic
vssoporiferous
  • NSFW
3 7.3

Causes people to feel slow, sleepy, and lose focus

causes natural sleep rather than drug-induced mental dullness
somnolent
vssoporiferous
  • Formal
2 8.4

Feeling sleepy or making you want to sleep

causes sleep itself rather than merely describing a sleepy state
soporific
vssoporiferous
2 8.6

Making you feel sleepy

causes sleep more directly rather than only creating drowsiness
hypnagogic
vssoporiferous
  • Specialized
2 9.9

Happening just before you fall asleep

induces sleep directly rather than naming the pre-sleep condition
slumberous
vssoporiferous
  • Literature
1 7.6

Calm and quiet in a way that makes you feel sleepy

induces actual sleep rather than only suggesting a sleepy atmosphere
hypnogogic
vssoporiferous
  • Specialized
1 9.9

A drowsy state that happens just before falling asleep

causes sleep itself rather than describing the pre-sleep experience
dormitive
vssoporiferous
  • Archaic
1 9.9

Making someone feel sleepy

shares meaning but differs only as an alternative wording or form
somniferous
vssoporiferous
  • Specialized
1 9.9

Causes someone to sleep or feel very sleepy

is the general sleep-inducing term rather than a specific form
slumbrous
vssoporiferous
  • Literature
1 9.9

A calm, quiet mood that makes you feel sleepy

brings on sleep actively rather than just suggesting it
somnific
vssoporiferous
  • Specialized
9.9

Making someone feel sleepy or fall asleep

is the stronger direct sleep-causing sense rather than a gentle effect
slumbery
vssoporiferous
  • Archaic
9.9

Having a sleepy, calm feeling that makes you relax

causes sleep itself instead of only showing a sleepy state

Antonyms

47 3.9

To make someone feel more awake and interested

19 4.4

Making you feel more energetic and alive

How Sleep-Inducing

narcotic
  • NSFW
3 7.3
hypnotic
  • Specialized
21 7.0
soporiferous
  • Formal
1 9.9
sedative
4 5.8
calming
1 2.6

Surface Forms

soporiferous positive

Morphology

soporiferous = sopor (opaque) = sopor + iferous

The word is historically compositional, but the base 'sopor' is rare and the learned suffix '-iferous' is unlikely to be transparent to an average B1 learner.

Etymology

Soporiferous comes from two Latin parts: sopor meaning 'deep sleep' and -ferous meaning 'bearing' or 'carrying', the same 'fer' you see in transfer which means 'to carry'. So, soporiferous literally means 'carrying sleep' and is used for something that makes you sleepy.