slackener
/ˈslækənər/
noun
- A person or thing that makes something slower, looser, or less intense.
- He was known as a slackener in the office, always finding ways to slow down projects.
- The rain was a welcome slackener for the intense heat of the afternoon.
- The new traffic light acted as a slackener, reducing the speed of cars through the intersection.
Antonyms