determined to do something despite difficulties, especially when other people are against you and think that you are being annoying or unreasonable

continuing for a long period of time, or repeated frequently, especially in a way that is annoying and cannot be stopped

Persistent heavy rain held up work on the bridge for more than a week.

The most common symptom is a persistent cough.

I can’t take much more of this persistent criticism.

He resigned over persistent rumours of his affair with an actress.

Famine is a persistent problem in many parts of the world.

LEARNit Dictionary