The quality or state of being ductile; ductility or the ability to be shaped and drawn without breaking.
From 'ductile' plus the noun-forming suffix '-ness' (from Old English). This is a synonym for 'ductility,' using the Germanic suffix pathway instead of Latin.
Ductileness and ductility mean the same thing but come from different etymological routes—one from Latin-based '-ity' and one from Germanic '-ness'—showing how English evolved multiple parallel ways to form nouns.
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