PERTINACITY Meaning of PERTINACITY in English pertinacity BrE AmE ˌpɜːt ɪ ˈnæs ət i ˌ•ə-, -ɪt i AmE \ ˌpɝːt ə n ˈæs ət̬ i Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012