Common Mistakes : Rapid
Rapid-Adjective
BAD: These new trains are very rapid
GOOD: These new trains are very fast
BAD: I rapidly took the gun out of my pocket
GOOD: I quickly took the gun out of my pocket
When used in connection with movement, rapid and rapidly usually refer to something that happens at a very fast rate: ‘She could hear rapid footsteps approaching.’ ‘The patient often develops a fever and breathing becomes rapid
Note that these words are mainly used to describe the speed with which something changes, develops, spreads etc: ‘Investors have profited from the country’s rapid economic growth.’ ‘Unemployment has been increasing rapidly over the past 8 years