Examples of pertinacious
<a pertinacious little boy who was determined to catch and collect reptiles>
<a pertinacious salesman who would simply not take “No!” for an answer>
Origin of pertinacious
Latin pertinac-, pertinax, from per- thoroughly + tenac-, tenax tenacious, from tenēre
First Known Use: 1626
Synonym Discussion of pertinacious
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