adjective
insistent
in-SIS-tunt/ɪnˈsɪstənt/
Persistent and forceful in demanding attention or a response.
The beagle's insistent pawing at the door attracts its owner's attention.

Etymology
The original image is of standing upon something: Latin used this combination both for taking a stand and for urging a point. That firmness underlies the modern sense of persistently demanding attention or action.
In context
But they were insistent, demanding with loud voices that he be crucified. And the voices of these men and the chief priests persisted and prevailed.
More examples
- The customer is insistent about getting a full refund.
- Despite his insistent questions, she refuses to reveal the surprise.
- An insistent alarm interrupts our conversation.
Forms
insistent · more insistent · most insistent
insist verb — Demand something firmly despite resistance or disagreement.
insistence noun — Persistent, firm demands for attention or action.
Similar words
- persistent
- Continuing without stopping, but not necessarily demanding a response.
- demanding
- Expecting much effort or attention, without necessarily repeating requests.
- urgent
- Requiring immediate attention, rather than necessarily involving repeated demands.