1. Questions buzzed in his head like pertinacious bees.

2. Objective To study the etiology of pertinacious chronic cough in children.

3. 13 synonyms for Bullheaded: dogged, hardheaded, headstrong, mulish, obstinate, pertinacious

4. I can affirm that he is tenacious and pertinacious as are few.

5. The ideas of my friend Watson, though limited are exceedingly pertinacious.

6. He had been driven into a corner by the pertinacious ingenuity of Miss French.

7. She is the most vocal and pertinacious of all the critics of the policy.

8. His style of argument in meetings is not so much aggressive as pertinacious.

9. But pupils of the more pertinacious sort profited greatly from his teaching and his company.