Insistent

From Latin insistens, participle of insisto.

Full definition of insistent

(obsolete) Standing or resting on something.
Urgent in dwelling upon anything; persistent in urging or maintaining.
Extorting attention or notice; coercively staring or prominent; vivid; intense.
(ornithology) Standing on end: specifically said of the hind toe of a bird when its base is inserted so high on the shank that only its tip touches the ground: correlated with incumbent.