noun, noun or participle which takes 'suru', intransitive verb
sudden deceleration; rapid deceleration; sharp slowdown
Used for a sudden reduction in speed, especially in vehicles or machinery. The first gloss 'sudden declaration' appears to be a mis-entry; this word consistently means rapid deceleration.
急減速すると後続車に追突される危険がある。
Sudden deceleration risks being rear-ended by the following vehicle.
この
This car has high stability during rapid deceleration.