This is the 825th most frequent Malay word.
motosikal
Motorcycle.
Here, 'motosikal' is used as a noun to mean motorcycle, the object being bought.
Dia membeli sebuah motosikal baharu semalam.
He bought a new motorcycle yesterday.
In this sentence, 'motosikal' refers to the mode of transportation, again as a noun, specifically as the vehicle being ridden.
Saya suka menaiki motosikal untuk pergi ke tempat kerja.
I enjoy riding a motorcycle to go to work.
Here, 'motosikal' is used to describe the source of the noise, again as a noun but emphasizing its association with the sound.