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Pronunciation of 

pertinacious

view main entry for pertinaciousadjective formal  /ˌpɜrtɪˈneɪʃəs/
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American English pronunciation: pertinaciousClick to listen to the pronunciation of pertinacious

derived word

pertinacity

  /ˌpɜrtɪˈnæsəti/  noun [uncountable]
American English pronunciation: pertinacityClick to listen to the pronunciation of pertinacity

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a small digital image … which is used in electronic communication to express emotion or other simple concepts

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Open Dictionary

major on (doing) sth

to have or do a lot of something; to focus on a particular thing

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