from
The Collaborative International Dictionary of English v.0.48
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.
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2. Resolute; persevering; constant; steady.
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Diligence is a steady, constant, and pertinacious
study. --South.
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Syn: Obstinate; stubborn; inflexible; unyielding; resolute;
determined; firm; constant; steady.
[1913 Webster] -- {Per`ti*na"cious*ly}, adv. --
{Per`ti*na"cious*ness}, n.
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