sleepless

Meanings

1. 1
   adj

   Characterized by an absence of sleep: wakeful.

   I spent a sleepless night worrying about the exams.

2. 2
   adj

   always watchful

3. 3
   adj

   experiencing or accompanied by sleeplessness

Etymology

From Middle English slepeles, from Old English slǣplēas; equivalent to sleep + -less.