Wakeful.

Wakeful.

Wakeful, sleepless; accustomed to keeping awake. Of time: Passed in wakefulness. archaic.

Keeping awake, esp. while others sleep, not yielding to sleep.

Wakeful; sleepless. Obsolete. rare.

Yielding no sleep; marked by the absence or want of sleep.

That remains awake; that keeps watch; figurative that continues on the alert, vigilant, watchful.

(un-, prefix1 affix 4.)

(un-, prefix1 affix 1.)

Obtaining or yielding no slumber; sleepless.