solidity

Meanings

1. 1
   noun

   The quality of being firm, hard, and keeping its shape.

   The solidity of the stone walls made the castle feel safe.

2. 2
   noun

   The quality of being strong, reliable, or well founded.

   The solidity of the evidence worked in my favor.

From solid + -ity, from Middle French solidité, from Latin soliditās.

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