persistent, determined, lasting
Tengo un dolor persistente aquí.
I have a persistent pain here.
Sí, es persistente, pero es su obligación.
Yes, he is persistent, but it is his obligation.
— Oppenheimer (2023)
He was persistent.
You’re so persistent!
Es tan persistente como una mosca azul, en el filo de una ventana.
It's as persistent as a bluebottle on a windowpane.
— La historia de David Copperfield (2019)
She is a very persistent lady.
— Peaky Blinders: El hombre inmortal (2026)
¿Has tenido tos persistente en los últimos días?
Have you had a persistent cough in the last few days?
I have a persistent cough.