This is the 8745th most frequent Russian word.
петтери
The word "петтери" does not appear to have a meaning in standard Russian; it might be a typo or a term from another context.
Here, 'Petteri' is used as a proper noun to refer to a person named Petteri.
Петтери любит гулять по парку утром.
Petteri likes walking in the park in the morning.
In this sentence, 'Petteri' is again used as a personal name in the context of an action.
Мы заметили, как Петтери собирал листья из земли.
We noticed how Petteri was collecting leaves from the ground.
The word 'Petteri' serves as the subject of the sentence, indicating ownership and interest in the hobby described.