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American pronunciation of 

pertinacious

view main entry for pertinacious adjective  /ˌpɜrtɪˈneɪʃəs/
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derived word

pertinacity

  /ˌpɜrtɪˈnæsəti/ noun [uncountable]
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This is the American English pronunciation of pertinacious.

View British English pronunciation of pertinacious.

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