( n. )
The quality or state of having been proved or tried; firmness or hardness that resists impression, or does not yield to force; impenetrability of physical bodies.
( n. )
The quality or state of having been proved or tried; firmness or hardness that resists impression, or does not yield to force; impenetrability of physical bodies.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012