Finnish word tarjoilija comes from Finnish -ja (Forms agent nouns, especially human ones; -er.), Finnish tarjoilla (To serve, dish out.)

Detailed word origin of tarjoilija

Dictionary entry	Language	Definition
-ja	Finnish (fin)	Forms agent nouns, especially human ones; -er.
tarjoilla	Finnish (fin)	To serve, dish out.
tarjoilija	Finnish (fin)	Server (unisex term for "waiter" and "waitress"). Waiter (male), waitress (female) (server in a restaurant or similar).

Words with the same origin as tarjoilija