Found 2 items, similar to sleeplessly.
English → English (WordNet) Definition: sleeplessly sleeplessly adv : without sleep; in a sleepless manner; “he was lying in bed sleeplessly”
English → English (gcide) Definition: Sleeplessly Sleepless \Sleep"less\, a. 1. Having no sleep; wakeful. [1913 Webster] 2. Having no rest; perpetually agitated. “Biscay's sleepless bay.” --Byron. [1913 Webster] -- Sleep"less*ly, adv. -- Sleep"less*ness, n. [1913 Webster]