sleepless
adj.unable to sleep or happening during a time when you cannot sleep. You use this to describe a night when you stay awake or a person who is very tired.
adj.characterised by a lack of sleep; unable to rest or find slumber. Often used to describe a period of time or the state of a person.
“She spent a sleepless night worrying about her exam.”
“After three sleepless nights with the newborn, the parents were struggling to stay focused during the day.”
“The protagonist's sleepless vigil by the window serves as a recurring motif, highlighting his growing anxiety and inability to find peace in his new surroundings.”
Commonly used both attributively before a noun and predicatively after linking verbs like 'remain' or 'be'.
“I had sleepless nights thinking if I go back to India, my life will change.”
From Middle English slepeles, from Old English slǣplēas; equivalent to sleep + -less.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.