This is the 241st most frequent Finnish word.
jolla
"Jolla" means "who has," "which has," or "that has" in English.
Here, 'jolla' is a relative pronoun indicating possession and connecting the subordinate clause 'jolla on hattu' to the main clause.
Hän on nainen, jolla on hattu.
She is a woman who has a hat.
In this sentence, 'jolla' introduces a descriptive clause that provides more information about 'talo,' showing ownership.
Se on talo, jolla on suuri puutarha.
It is a house that has a big garden.
Here, 'jolla' links the additional attribute of owning a blue car to the main clause as a defining characteristic of 'henkilön.'