imperative

Holmes's cross-examination was interrupted by an imperative knocking at the door.

“Ground arms,” exclaimed the chief, with an imperative sign of the hand, while with the other he took off his hat respectfully; then, turning to the singular personage who had caused this scene, he said, “Your pardon, your excellency, but I was so far from expecting the honor of a visit, that I did not really recognize you.”

Noirtier cast an appealing look on Valentine, which look was at once so earnest and imperative, that she answered immediately.

“Count, you must doubtless be surprised at my reserve, and I assure you it costs me much to act in such a manner towards you; but, believe me when I say that imperative necessity has imposed the painful task upon me.”