pertinaciousness en · NOUN
Etymology
Etymology tree English pertinacious Proto-Germanic *-inōną Proto-Indo-European *-dyé- Proto-Germanic *-atjaną Proto-Indo-European *-tus Proto-Germanic *-þuz Proto-Germanic *-assuz Proto-Germanic *-inassuz Proto-West Germanic *-nassī Old English -nes Middle English -nesse English -ness English pertinaciousness From pertinacious + -ness.
Meanings
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(uncountable) The state or characteristic of being pertinacious.
I had too much experience of my father's pertinaciousness ever to hope for a change in his views.
1805, Charles Brockden Brown, Wieland; and Memoirs of Carwin the Biloquist, Penguin Classics, published 1991, →ISBN, page 289: