sleepless A2 Topic:People & Society US /ˈsliːpləs/ See IPA manual Freq #14514 Meanings 1 adj Without sleep; unable to sleep. I spent a sleepless night worrying about the exam. Thesaurus Synonyms 1 adj · without sleep; unable to... watchful ↔ Opposites wakeless Word family Forms sleeplessness Common collocations sleepless night Adjective + noun Etymology AI details From Middle English slepeles, from Old English slǣplēas; equivalent to sleep + -less. slepeles Middle English slǣplēas Old English View etymology graph -> Topics People & Society External links Cambridge Dictionary Wiktionary Google Images # sleepless **Type:** Word **Level:** A2 **Part of speech:** adj **IPA (US):** /ˈsliːpləs/ **Frequency rank:** 14514 ## Meanings 1. Without sleep; unable to sleep. ## Examples - I spent a sleepless night worrying about the exam. ## Antonyms - wakeless ## Roots and Affixes - Root: slepeles - Root: slǣplēas ## Etymology From Middle English slepeles, from Old English slǣplēas; equivalent to sleep + -less. ## AI Etymology Sleepless is from Middle English slepeles, from Old English slǣplēas; equivalent to sleep + -less. Important forms in the word's history include Middle English slepeles, Old English slǣplēas. In current use it includes the sense Without sleep; unable to sleep. ## Topics - People & Society markdown