pertinacy

English

Etymology 1

From Latin pertinacia, from pertinax. See pertinacious.

Noun

pertinacy (usually uncountable, plural pertinacies)

  1. Obsolete form of pertinacity.

Etymology 2

From Latin pertinere.

Noun

pertinacy (uncountable)

  1. The quality or state of being pertinent; pertinence.