速そく度どを緩ゆるめる

expression, ichidan verb

ease up the speed; slow down

Used when deliberately reducing speed, often in driving or operating machinery.

• カーブの手て前まえで速そく度どを緩ゆるめた。

  I eased up the speed before the curve.

• 工こう事じ区く間かんでは速そく度どを緩ゆるめてください