Verb
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make more intense, stronger, or more marked
"The efforts were intensified", "Her rudeness intensified his dislike for her"
"Pot smokers claim it heightens their awareness"
"This event only deepened my convictions"
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make (one's senses) more acute
"This drug will sharpen your vision"
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increase the height of
"The athletes kept jumping over the steadily heightened bars"
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increase
"This will enhance your enjoyment"
"heighten the tension"
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make more extreme
raise in quantity, degree, or intensity
"heightened interest"
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become more extreme
"The tension heightened"