From WordNet (r) 3.0 (2006):
waken
v 1: cause to become awake or conscious; "He was roused by the
drunken men in the street"; "Please wake me at 6 AM." [syn:
awaken, wake, waken, rouse, wake up, arouse]
[ant: cause to sleep]
2: stop sleeping; "She woke up to the sound of the alarm clock"
[syn: wake up, awake, arouse, awaken, wake, come
alive, waken] [ant: dope off, doze off, drift off,
drop off, drowse off, fall asleep, flake out, nod
off]