pertinaciously

“Miss Eyre, I repeat it, you can leave me. How often am I to say the same thing? Why do you remain pertinaciously perched on my knee, when I have given you notice to quit?”

Manners endeavoured more than once to bring him back to the subject, but the gipsy pertinaciously avoided any approach to it.

On the contrary, the book is sharply and pertinaciously aggressive.

I am persuaded that my opposition only makes him cling the more pertinaciously to his absurd plan.'

"How so?" inquired Amy, hoping to gain some intelligence as to why her room was so pertinaciously kept closed.