rapidity
nounUK /rəˈpɪd.ə.ti/
US /rəˈpɪd.ə.t̬i/
Rapidity is how fast something happens or moves.
The rapidity of the storm surprised everyone in the village.
RELATED WORDS
OTHER MEANINGS
2. The quality of happening in a very short time.
The rapidity of the changes left little time to adjust.
3. A steep or sudden slope in a river, causing fast-flowing water.
The boat picked up speed as it entered the rapidity of the narrow channel.
4. In physics, the rate at which an object's position changes over time.
Scientists measured the rapidity of the particle as it crossed the chamber.