This is the 2688th most frequent Korean word.
시속
"시속" means "speed per hour" or "kilometers per hour (km/h)."
Here, '시속' is used to specify the speed of motion, with a quantitative measure followed by the unit '킬로미터' indicating kilometers per hour.
이 차는 시속 100킬로미터로 달립니다.
This car runs at a speed of 100 kilometers per hour.
In this sentence, '시속' is employed conceptually to discuss the measurement of speed, encouraging the use of a device for precision.
달리기의 시속을 측정하려면 초시계를 사용하세요.
To measure the speed of running, use a stopwatch.
The term '시속' here refers to the regulated speed limit, often a legal or recommended limit for vehicles or individuals.