The difference between Arouse and Turn on
When used as verbs, arouse means to stimulate feelings, whereas turn on means to set a flow of fluid or gas running by rotating a tap or valve.
check bellow for the other definitions of Arouse and Turn on
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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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Turn on as a verb (transitive):
To set a flow of fluid or gas running by rotating a tap or valve.
Examples:
"'Turn on the tap"
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Turn on as a verb (transitive):
To power up, to put into operation, to start, to activate (an appliance, light, mechanism, functionality etc.).
Examples:
"Please turn the lights on so I can see what I'm reading."
"Please turn on automatic updates."
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Turn on as a verb (intransitive, of a device):
To start operating; to power up, to become on.
Examples:
"My computer won't turn on."
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Turn on as a verb (transitive):
To fill with enthusiasm; to intoxicate, give pleasure to ( + to an object of interest or excitement).
Examples:
"Attractive packaging can turn buyers on to a product."
"Attractive showroom models can turn buyers on'"
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Turn on as a verb (transitive):
To sexually arouse.
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Turn on as a verb (transitive, slang):
To cause to take up drugs, especially hallucinogens.
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Turn on as a verb (intransitive):
To violently rebel against; to suddenly attack .
Examples:
"Suddenly all his friends turned on him."
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Turn on as a verb (intransitive):
To depend upon; to pivot around, to have as a central subject .
Examples:
"The argument turned on the question of whether or not jobs would be lost."