The term 'slowed down' can be expressed in a variety of ways. The 6-letter solution, 'braked, ' refers to the act of pressing the brakes on a vehicle to reduce its speed. The 11-letter solution, 'DECELERATED, ' is a more scientific term for the same concept, referring to the decrease in speed due to a decrease in acceleration. The 15-letter solution, 'cooledonesheels, ' is a more figurative expression, suggesting that the person or object in question has been slowed down as if their heels were cooled off.