Obstinately refusing to give up or let go.
Of data or a data structure: not transient or temporary, but remaining in existence after the termination of the program that creates it.
Describing a fractal process that has a positive Brown function
Lasting past maturity without falling off.
non-transient.
Insistently repetitive.
Indefinitely continuous.
Unwilling to yield or give up; dogged.
Having a good memory; retentive.
Holding together; cohesive.
Clinging to an object or surface; adhesive.