Definition of heighten
1a
: to increase the amount or degree of : augment
b
: to make brighter or more intense : deepen
c
: to bring out more strongly : point up
d
: to make more acute : sharpen
2a
: to raise high or higher : elevate
b
: to raise above the ordinary or trite
2a
: to become great or greater in amount, degree, or extent
b
: to become brighter or more intense
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Merriam-Webster unabridged
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Time Traveler for heighten
The first known use of heighten was in 1523
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