per`ti*na"cious*ly
Webster's Dictionary (GCIDE)
Pertinacious \Per`ti*na"cious\, a. [L. pertinax, -acis; per + tenax tenacious. See Per-, and Tenacious.]
1.Holding or adhering to any opinion, purpose, or design, with obstinacy; perversely persistent; obstinate; as, pertinacious plotters; a pertinacious beggar. [1913 Webster]
2.Resolute; persevering; constant; steady. [1913 Webster]
Diligence is a steady, constant, and pertinacious study.— South.[1913 Webster]
Syn: Obstinate; stubborn; inflexible; unyielding; resolute; determined; firm; constant; steady. [1913 Webster] -- Per`ti*na"cious*ly, adv. -- Per`ti*na"cious*ness, n. [1913 Webster]