insistent

Firm in asserting a demand or an opinion; unyielding.

Demanding attention or a response.

Repetitive and persistent.

Standing or resting on something.

Urgent in dwelling upon anything; persistent in urging or maintaining.

Hence Extorting attention or notice; coercively staring or prominent; vivid; intense.

In 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.

Standing or resting on something.

Insisting; persistent; persevering.

See Incumbent.