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[Alteration of Middle English testif, headstrong, from Old French testu, from teste, head, from Late Latin testa, skull; see teston.]
![]() | The American Heritage® Dictionary of the English Language, Fourth EditionCopyright © 2005, 2000 by Houghton Mifflin Company. Updated 2005. Published by Houghton Mifflin. All rights reserved. |