persistent

determined to do something despite difficulties; continuing for a long period of time without interruption, or repeated frequently, especially in a way that is annoying and cannot be stopped ดื้อ, อย่างต่อเนื่อง, เรื่อยไป, ติดต่อกัน, ตลอดเวลา

Not surprisingly, the reporter involved was Channel 7's Somjit Nawakruasunthorn who is known for her persistent and tough questioning.

I was so persistent that sometimes I felt embarrassed, but I was so passionate about the idea of opening this business that I was willing to go the extra mile to make it happen.

He said water pumps will be installed in areas most vulnerable to persistent flooding.