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pertinacity
From The Collaborative International Dictionary of English v.0.48:
Pertinacity \Per`ti*nac"i*ty\, n. [Cf. F. pertinacit['e].] The quality or state of being pertinacious; obstinacy; perseverance; persistency. --Macaulay. [1913 Webster] Syn: See Obstinacy. [1913 Webster]

