sinewy [sin-yoo-ee] WORD ORIGIN adjective having strong: a sinewy back. of or like ; tough, firm, braided, or resilient: a sinewy rope. having conspicuous ; stringy: tough, sinewy meat. vigorous or forceful, as language, style, etc.: a sinewy argument.
Origin of sinewy Middle English word dating back to 1350–1400; see origin at, Related formssin·ew·i·ness, nounun·sin·ew·y, adjective Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019 British Dictionary definitions for sinewiness sinewy adjective consisting of or resembling a tendon or tendons muscular; brawny (esp of language, style, etc) vigorous; forceful (of meat, etc) tough; stringy Derived Formssinewiness, noun Collins English Dictionary – Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Word Origin and History for sinewiness sinewy adj.
late 14c., “made of sinews,” from+ (2). As “tough, stringy” from 1570s.
Online Etymology Dictionary, © 2010 Douglas Harper