Wakener

wak·en  (wkn)

v. wak·ened, wak·en·ing, wak·ens

v.tr.

1. To rouse from sleep; awake: The noise wakened me.

2. To rouse from a quiescent or inactive state; stir.

v.intr.

To become awake; wake up: I plan to waken at six o'clock tomorrow. See Usage Note at wake¹.

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[Middle English wakenen, from Old English wæcnan; see weg- in Indo-European roots.]

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waken·er n.