This is the 742nd most frequent Finnish word.
kuljettaja
Driver
Kuljettaja is used here as a noun to denote a professional driver, specifically a bus driver.
Bussi kuljettaja ajoi taitavasti liukkaassa säässä.
The bus driver drove skillfully in slippery weather.
Kuljettaja is used again as a noun, indicating a person who drives a taxi professionally.
Hän haluaa olla taksin kuljettaja tulevaisuudessa.
He wants to be a taxi driver in the future.
Here, 'kuljettaja' (driver) refers to an individual operating a vehicle.