wakener

intransitive verb

1. to become awake; come to one's senses after sleep or a state like sleep
2. to become active, animated, or alive after inactivity or dormancy

Origin: ME waknen < OE wacnian, wæcnan, to become awake, akin to ON vakna, to waken: for IE base see wake

transitive verb

1. to cause to wake; awake
2. to urge or stir into action or activity; arouse; excite