drift off

English Thesaurus

1. change from a waking to a sleeping state (verb.body)

hyponym	:	zonk out,
definition	:	fall asleep fast, as when one is extremely tired (verb.body)

antonym	:	arouse, awake, awaken, come alive, wake, wake up, waken,
definition	:	stop sleeping (verb.body)

antonym	:	arouse, awake, awaken, come alive, wake, wake up, waken,
definition	:	stop sleeping (verb.body)