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matterate

[mat-uh-reyt]
verb (used without object), mat·ter·at·ed, mat·ter·at·ing. New England, Upstate New York, and Southern U.S..
  1. to fester; suppurate.
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Origin of matterate

perhaps by folk etymology from maturate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018