This is the 8437th most frequent Russian word.
нарва
"Нарва" is not a standalone Russian word; it is most likely a proper noun referring to Narva, a city in Estonia.
In this sentence, 'нарвался' (past tense of the verb 'нарваться') means 'encountered' or 'got into' something unwanted accidentally, like trouble.
Он нарвался на неприятности.
He encountered trouble.
'Нарваться' in this instance suggests an inadvertent or reluctant engagement with an undesirable consequence like a fine.
Чтобы не нарваться на штраф, соблюдайте правила.
To avoid getting fined, follow the rules.
Here, 'нарвалась' implies encountering an undesired or unexpected reaction such as criticism after an action or event.