amasser
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a·mass
(ə-măs′)v. a·massed, a·mass·ing, a·mass·es
v.tr.
1. To gather together or accumulate a large quantity of (something): amass evidence; amass a fortune.
2. To be the site of (an increasing mass), especially as a result of neglect: How long has the desk been amassing bills?
v.intr.
To come together; collect: troops amassing on the border. See Synonyms at gather.
[Middle English, to accumulate, from Old French amasser, to assemble : a-, to (from Latin ad-; see ad-) + masser, to gather together (from Latin massa, lump, mass; see mass).]
a·mass′a·ble adj.
a·mass′er n.
a·mass′ment n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.