Meanings
adjectivesleepless (comparative more sleepless, superlative most sleepless)
comparative more sleepless · superlative most sleepless
Synonyms & antonyms
Opposite
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
- Old Englishslǣplēas
- Middle Englishslepeles
- Englishsleepless
From Middle English slepeles, from Old English slǣplēas; equivalent to sleep + -less.
More words from Middle English, Old English
Full word history & related roots →Translations
Ancient Greek ἄγρυπνος
- ἄγρυπνος (ágrupnos)absence of sleep
Bulgarian безсънен
- безсънен (bezsănen)absence of sleep
Catalan insomne
- insomneabsence of sleep
Czech bezesný
- bezesnýabsence of sleep
Dutch slapeloos
- slapeloosabsence of sleep
Esperanto sendorma
- sendormaabsence of sleep
Finnish uneton
- unetonabsence of sleep
French insomniaque
- insomniaqueabsence of sleep
German schlaflos
- schlaflosabsence of sleep
Hindi उन्निद्र, अनिद्रा
- उन्निद्र (unnidra)absence of sleep
- अनिद्रा (anidrā)absence of sleep
Hungarian álmatlan
- álmatlanabsence of sleep
Japanese 寝不足
- 寝不足 (nebusoku)absence of sleep
Latin insomnis, insopor
- insomnisabsence of sleep
- insoporabsence of sleep
Māori koheko, whakawhetū
- kohekoabsence of sleep
- whakawhetūabsence of sleep
Norwegian Bokmål søvnløs
- søvnløsabsence of sleep
Polish bezsenny
- bezsennyabsence of sleep
Portuguese insone
- insoneabsence of sleep
Romanian nedormit
- nedormitabsence of sleep
Russian бессо́нный
- бессо́нный (bessónnyj)absence of sleep
Spanish sin dormir, de desvelo
- sin dormirabsence of sleep
- de desveloabsence of sleep
- desveladoabsence of sleep
- en velaabsence of sleep
Swedish sömnlös
- sömnlösabsence of sleep
Tagalog puyat
- puyatabsence of sleep
Turkish uykusuz
- uykusuzabsence of sleep
Ukrainian безсо́нний
- безсо́нний (bezsónnyj)absence of sleep
Welsh di-gwsg
- di-gwsgabsence of sleep
Rhymes & wordplay
Anagrams
Cite this entry
APA
sleepless. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/sleepless
MLA
“sleepless.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/sleepless. Accessed November 2, 2026.
Chicago
WatkinsX Dictionary, s.v. “sleepless,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/sleepless.
Source: sleepless on Wiktionary, CC BY-SA 4.0.