The prototype deaccelerated unexpectedly during the test run, prompting the engineers to inspect the control software.

When the road ahead narrowed, the driver had to deaccelerate to avoid an accident.

The drone hovered above the crowd, deaccelerating as it approached the landing pad.

The probe deaccelerates as it enters the planet's atmosphere to avoid damage.

The deacceleration of the vehicle surprised the passengers, who were unprepared for the sudden slowdown.

During the track test, the engineers recorded multiple deaccelerations that required further analysis.