not disposed to forgive or show mercy; unrelenting.
not allowing for mistakes, carelessness, or weakness: the unforgiving nature of aviation.
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Origin of unforgiving
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for unforgivingness
Historical Examples of unforgivingness
Her aunt had left out all that mattered—all the feeling, the hate, the love, the unforgivingness of passionate hearts.The Forsyte Saga, Volume III.
not willing to forgive; unmerciful
(of a machine, system, etc) allowing little or no opportunity for mistakes to be corrected
harsh and unremittingan unforgiving and desolate landscape
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
Online Etymology Dictionary, © 2010 Douglas Harper