Antonyms of verb wake_up

1 of 2 senses of wake up

Sense 2
wake up, awake, arouse, awaken, wake, come alive, waken -- (stop sleeping; "She woke up to the sound of the alarm clock")
       Antonym of fall asleep (Sense 1)
      => fall asleep, dope off, flake out, drift off, nod off, drop off, doze off, drowse off -- (change from a waking to a sleeping state; "he always falls asleep during lectures")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb wake_up

2 senses of wake up

Sense 1
awaken, wake, waken, rouse, wake up, arouse -- (cause to become awake or conscious; "He was roused by the drunken men in the street"; "Please wake me at 6 AM.")
       => change, alter, modify -- (cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue")

Sense 2
wake up, awake, arouse, awaken, wake, come alive, waken -- (stop sleeping; "She woke up to the sound of the alarm clock")
       => change state, turn -- (undergo a transformation or a change of position or action; "We turned from Socialism to Capitalism"; "The people turned against the President when he stole the election")