The word "swiftness" in English means: The quality of moving or doing something quickly., The quality of happening or being done quickly and without delay..
The phonetic transcription of "swiftness" is /ˈswɪftnəs/ in British English and /ˈswɪftnəs/ in American English. Click the 🔊 button to hear both pronunciations.
Synonyms for "swiftness": speed, rapidity, velocity, alacrity.
Example usage of "swiftness": "The swiftness of the cheetah is amazing to watch as it hunts.". More examples on the page.