S0470100 (slēp′lĭs)adj.1. a. Marked by a lack of sleep: a sleepless night.b. Unable to sleep.2. Always alert or active; never resting: a sleepless district of the city.sleep′less·ly adv.sleep′less·ness n.Thesaurus
Adv.
1.
sleeplessly - without sleep; in a sleepless manner; "he was lying in bed sleeplessly"