adjective
persistent
pur-SIS-tunt/pərˈsɪstənt/
Continuing or remaining despite interruption or difficulty.
The persistent gardener keeps tending the plant as it recovers.

Etymology
The pieces describe standing firm or continuing steadfastly. The adjective initially meant “enduring,” then developed the more pointed sense of continuing despite opposition or warnings.
In context
The nuthatch is not willing to share his patch with noisy sparrows. The sparrows are persistent and settle in to furnish their new homes.
More examples
- A persistent cough keeps her awake at night.
- His persistent questions finally lead to a clear answer.
- The app keeps persistent data even after it closes.
Forms
persistent · more persistent · most persistent
persist verb — To continue or remain despite difficulty.
persistence noun — Continued effort or existence despite difficulty.