The word “slowed” means to reduce the speed or rate of something. Some synonyms for “slowed” are “decelerated”, “retarded”, “slackened”, and “eased off”.
“Decelerated” is a more technical term that implies a reduction in velocity. For example, “The car decelerated as it approached the curve.” This shows that the car reduced its speed as it got closer to the bend in the road.
“Retarded” can also mean to slow down or delay. However, this word can have a negative connotation and is not as commonly used in polite conversation. “The growth of the economy was retarded by the recession.” Here, the recession is said to have slowed down the growth of the economy.
“Slackened” suggests a lessening of tension or effort, which results in a slower pace. “The pace of construction slackened due to bad weather.” This means that the construction work slowed down because of the adverse weather conditions.
“Eased off” implies a gradual reduction in intensity or speed. “The wind eased off as the storm passed.” This shows that the wind became less strong as the storm moved on.