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Related to contentiously: Controversion
1. Given to contention; quarrelsome. See Synonyms at argumentative.
2. Involving or causing contention; controversial: "a central and contentious element of the book" (Tim W. Ferguson).
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.