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sleepiness

sleepiness

8 1.0
A feeling of being ready to sleep
  • noun
  • /ˈsliːpɪnəs/
translation icon : somnolencia
  • Moreover, sleep loss resulted in daytime sleepiness that was also correlated with poor academic performance.
  • daytime sleepiness
  • excessive sleepiness
  • physiological sleepiness

Another potent lever for adjusting your sleepiness and wakefulness is caffeine.

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Examples

  • As we drove away from Granville and the darkness fell around us, our sleepiness returned.

    Fiction book (1990)
  • You'll notice extreme daytime sleepiness to the point where some patients have car accidents from falling asleep while driving.

  • I almost had an accident last night from, from, uh, sleepiness... ...so I decided to pull over.

  • I almost had an accident last night from sleepiness, - so I decided to pull over.

  • And it creates the feeling of sleepiness independent of time of day or night.

  • I'm half blind with sleepiness.

  • Some studies showed the adverse effects of insufficient sleep and sleepiness on school functioning.

    Academic text (2012)
  • In addition, most patients have excessive daytime sleepiness at this RDI level.

    Academic text (1999)
  • In school the next day, she was dizzy with sleepiness; her eyelids closed relentlessly.

    Fiction book (1990)
  • After staying up late studying, I felt an overwhelming sense of sleepiness during my morning lectures.

Synonyms

drowsiness
vssleepiness
6 1.8

A feeling of being very sleepy and wanting to sleep

is more about readiness or clear desire to sleep than general tiredness
somnolence
vssleepiness
  • Specialized
1 9.3

A strong feeling of tiredness that makes you want to sleep

is a general readiness to sleep rather than unusually deep tiredness
nappiness
vssleepiness
7.2

A strong feeling of sleepiness that makes you want to nap

is a general readiness for sleep rather than a habit of short daytime rests

Antonyms

14 2.9

A state of being watchful and ready to notice and act on danger or problems

4 4.7

A period when you are not sleeping, often because you cannot fall asleep at night

How Sleepy

somnolence
  • Specialized
1 9.3
drowsiness
6 1.8
sleepiness
8 1.0
tiredness
10 1.0
alertness
14 2.9

Surface Forms

sleepiness singular
sleepinesses plural

Morphology

sleepiness = sleepy (transparent) = sleep + y + ness

Formed from 'sleep' -> 'sleepy' -> 'sleepiness', the meaning (state of being sleepy) is directly predictable from the base.

Etymology

Sleepiness comes from the simple word sleep plus the ending -ness, which turns a verb or adjective into a state or condition. So sleepiness means the feeling of being 'ready to sleep' or 'wanting to close your eyes', like after a long day.