This is the 16th most frequent Finnish word.
olla
"To be."
The word 'olen', which is a conjugation of 'olla', is used to denote a state of being, linking the subject 'I' with the predicate 'teacher'.
Minä olen opettaja.
I am a teacher.
The word 'on', derived from 'olla', expresses the existence of warmth in a specific location.
Täällä on lämmin.
It is warm here.
The infinitive form 'olla' is used to express the conceptual action or state of being helpful in a polite question.