sleeplessness

English

Etymology

Etymology tree

English sleepless

Proto-Germanic *-in-

Proto-Indo-European *-h₂

Proto-Indo-European *-éh₂

Proto-Indo-European *-yéti

Proto-Indo-European *-eh₂yéti

Proto-Indo-European *-h₂ti

Proto-Germanic *-ōną

Proto-Germanic *-inōną

Proto-Indo-European *-dyé-

Proto-Germanic *-atjaną

Proto-Indo-European *-tus

Proto-Germanic *-þuz

Proto-Germanic *-assuz

Proto-Germanic *-inassuz

Proto-West Germanic *-nassī

Old English -nes

Middle English -nesse

English -ness

English sleeplessness

From sleepless + -ness.

Pronunciation

• Audio (US):

  (file)

Noun

sleeplessness (usually uncountable, plural sleeplessnesses)

1. Lack of sleep; the property of being sleepless; the inability to sleep, insomnia.

   Synonym: insomnolence

   Antonyms: sleep, sleepiness, somnolence

See also

• broken sleep
• insomnia
• sleep disorder

Translations

property of being sleepless — see insomnia