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Webster 1913 Edition

Toughness

Tough′ness

,
Noun.
The quality or state of being tough.

Webster 1828 Edition

Toughness

TOUGHNESS

,
Noun.
tuf'ness. The quality of a substance which renders it in some degree flexible, without brittleness or liability to fracture; flexibility with a firm adhesion of parts; as the toughness of steel.
1.
Viscosity; tenacity; clamminess; glutinousness; as the toughness of mucus.
2.
Firmness; strength of constitution or texture.

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