Rapid
RAP'ID, adjective [Latin rapidus, from rapio, the primary sense of which is to rush.]
1. Very swift or quick; moving with celerity; as a rapid stream; a rapid flight; a rapid motion.
Part shun the goal with rapid wheels.
2. Advancing with haste or speed; speedy in progression; as rapid growth; rapid improvement.
3. Of quick utterance of words; as a rapid speaker.