sleepless

[ sleep-lis ]
/ ˈslip lɪs /
SEE SYNONYMS FOR sleepless ON THESAURUS.COM

adjective

without sleep: a sleepless night.
watchful; alert: sleepless devotion to duty.
always active: the sleepless ocean.

Origin of sleepless

late Middle English word dating back to 1375–1425; see origin at sleep, -less

OTHER WORDS FROM sleepless

sleep·less·ly, adverb sleep·less·ness, noun

Words nearby sleepless

sleeping partner, sleeping pill, sleeping policeman, sleeping porch, sleeping sickness, sleepless, sleepover, sleepshirt, sleepwalk, sleepwalking, sleepwear

Words related to sleepless

fidgety, active, alert, antsy, anxious, edgy, jumpy, nervous, troubled, unsettled, wakeful, wide-awake, wired, worried, bustling, fidgeting

Example sentences from the Web for sleepless

British Dictionary definitions for sleepless

sleepless
/ (ˈsliːplɪs) /

adjective

without sleep or rest a sleepless journey
unable to sleep
always watchful or alert
mainly poetic always active or moving the sleepless tides

Derived forms of sleepless

sleeplessly, adverb sleeplessness, noun