This is the 724th most frequent Korean word.
속도를
"속도를" means "speed" or "velocity" (in the context of being an object in a sentence).
'속도를' in this sentence means 'speed' and shows an object in the action of reducing speed.
그 차량은 속도를 줄였습니다.
The vehicle reduced its speed.
In this sentence, '속도를' refers to the rate or performance, pertaining to processing efficiency.
새로운 컴퓨터는 작업 처리 속도를 크게 향상시켰습니다.
The new computer significantly improved processing speed.
Here, '속도를' denotes 'speed' in the context of maintaining or controlling while driving.