amassed; amassing; amasses
Definition of amass
1
: to collect for oneself : accumulate
amass a great fortune
2
: to collect into a mass : gather
must select rather than simply amass details
: to come together : assemble
Dark clouds amassed over the city.
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Merriam-Webster unabridged
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Time Traveler for amass
The first known use of amass was in the 15th century
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