PERTINACIOUSLY
pertinaciously
(adverb) in a dogged and pertinacious manner; “he struggled pertinaciously for the new resolution”
Source: WordNet® 3.1
Etymology
Adverb
pertinaciously (comparative more pertinaciously, superlative most pertinaciously)
In a stubbornly resolute manner; tenaciously holding one's opinion or course of action.
Synonyms
• doggedly, obstinately, persistently, resolutely, stubbornly, unyieldingly
Source: Wiktionary
PERTINACIOUS
Per`ti*na"cious, a.Etym: [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.
2. Resolute; persevering; constant; steady.
Diligence is a steady, constant, and pertinacious study. South.
Syn.
– Obstinate; stubborn; inflexible; unyielding; resolute;
determined; firm; constant; steady.
– Per`ti*na"cious*ly, adv.
– Per`ti*na"cious*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition