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R_________
Definitions
the quality of being difficult to do
Word origin
From rugged + -ness.
Used in a sentence
“The surface of which […] could not nevertheless hide a multitude of holes and scratches and ruggednesses from being discover'd by the Microscope to invest it […].”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer0 curated clues
No curated clues for ruggedness yet.