This is the 303rd most frequent Bulgarian word.
км
The Bulgarian word "км" is an abbreviation for "kilometer" (km) in English.
In this sentence, 'км' is used as an abbreviation for 'километър', which is the unit of distance in metric measurements.
Разстоянието между двата града е 50 км.
The distance between the two cities is 50 km.
In this usage, 'км' is part of a compound unit 'км/ч', which translates to 'km/h', denoting speed in kilometers per hour.
Скоростта на движение е ограничена до 90 км/ч.
The speed is limited to 90 km/h.
Here, 'км' is part of a measurement describing the fuel efficiency of a vehicle, expressed in liters per 100 kilometers.