The superlative form of quick; the fastest in comparison to others.

सबसे तेज

English Usage: He was the quickest runner in the competition.

Hindi Usage: वह प्रतियोगिता में सबसे तेज़ धावक था।

In a quick manner; swiftly.

तेजी से

English Usage: She completed the task quickly.

Hindi Usage: उसने काम तेजी से पूरा किया।

The quality or state of being quick; speed.

तेजी

English Usage: The quickness of his response surprised everyone.

Hindi Usage: उसकी प्रतिक्रिया की तेजी ने सभी को चकित कर दिया।