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The loud noise roused the sleeping baby.
The loud noise woke up the sleeping baby.
to wake someone from sleep
The alarm clock roused him at 6 AM.
The alarm clock woke him up at 6 AM.
Often used when someone is woken abruptly or with difficulty.
to stir someone to action or emotion
Her speech roused the crowd to protest.
Her speech motivated the crowd to protest.
Can imply awakening someone's emotions or passions.
Remember that 'rouse' can mean both waking someone up and stirring them to action.
The meaning depends on whether it's used in a literal (sleep) or figurative (motivation) context.
From Middle English 'rousen', from Old French 'resouscir', from Latin 'resuscitare' (to revive).
Can be used both literally (waking someone up) and figuratively (motivating someone).