Found 2 items, similar to pertinaciously.
English → English (WordNet) Definition: pertinaciously pertinaciously adv : in a dogged and pertinacious manner; “he struggled pertinaciously for the new resolution”
English → English (gcide) Definition: Pertinaciously 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]