Quickest

adjective

1. Moving with speed, rapidity or swiftness, or capable of doing so; rapid; fast.

   "He's a quick runner."

2. Occurring in a short time; happening or done rapidly.

   "That was a quick meal."

3. Lively, fast-thinking, witty, intelligent.

   "You have to be very quick to be able to compete in ad-lib theatrics."

4. Mentally agile, alert, perceptive.

   "My father is old but he still has a quick wit."

5. Of temper: easily aroused to anger; quick-tempered.

   "He is wont to be rather quick of temper when tired."