Webster’s New World College Dictionary verb transitive ingrain
Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.
Word OriginME engreinen < OFr engrainer, to dye scarlet < en- (see en-1) + graine, seed, cochineal dye; assoc. in both Fr & E with grain (texture): see grain