The difference between Arouse and Wake up
When used as verbs, arouse means to stimulate feelings, whereas wake up means to awaken.
check bellow for the other definitions of Arouse and Wake up
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Arouse as a verb:
To stimulate feelings.
Examples:
"The new building proposals in the village are arousing unneeded discomfort."
"to arouse compassion;  to arouse jealousy; to arouse anger"
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Arouse as a verb (euphemism):
To sexually stimulate. To cause an erection of the penis or other physical signs of sexual arousal, such as fluid secretion.
Examples:
"I can't keep my eyes off the dancer; she arouses me greatly."
"I can't wear wool underwear: it tends to arouse me at inappropriate times."
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Arouse as a verb:
To wake from sleep or stupor.
Examples:
"She was snoring and nothing would arouse her."
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Wake up as a verb (intransitive):
To awaken.
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Wake up as a verb (transitive):
To awaken somebody.
Examples:
"'Wake your brother up; it's time for school."
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Wake up as a verb (intransitive):
To become more aware of a real-life situation; to concentrate on the matter in hand.
Examples:
"Some businesses were slow to wake up to the importance of the Internet."
"That's the third time you've made the same mistake. Wake up!'"