Definition of lessen
: to shrink in size, number, or degree : decrease
The pain will lessen over time.
1
: to reduce in size, extent, or degree
lessen tensions between nations
2a
archaic
: to represent as of little value
b
: to lower in status or dignity : degrade
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Merriam-Webster unabridged
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Time Traveler for lessen
The first known use of lessen was in the 14th century
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