/perr'tn as"i tee/ , n.
the quality of being pertinacious; persistence.
[ 1495-1505; pertinacitas, for L pertinacia stubbornness, perseverance ( > obs. pertinacy ), equiv. to pertinaci- (s. of pertinax ) steadfast, stubborn + -tas -TY 2 . See PER-, TENACITY ]
Syn . firmness, determination, resolution. See perseverance .