Rebuff

Part of speech: noun (n.)

1. Repercussion, or beating back; a quick and sudden resistance. The strong rebuff of some tumultuous cloud. Milton.

2. Sudden check; unexpected repulse; defeat; refusal; repellence; rejection of solicitation.

Part of speech: verb (v.)

To beat back; to offer sudden resistance to; to check; to repel or repulse violently, harshly, or uncourteously.