— pertinaciously , adv. — pertinaciousness , n.
/perr'tn ay"sheuhs/ , adj.
1. holding tenaciously to a purpose, course of action, or opinion; resolute.
2. stubborn or obstinate.
3. extremely or objectionably persistent: a pertinacious salesman from whom I could not escape.
[ 1620-30; PERTINACI(TY) + -OUS ]
Syn. 1. persevering. 2. dogged.