This is the 903rd most frequent Indonesian word.
persis
Exact; precise.
In this sentence, 'persis' means 'exactly' and specifies the spatial precision of the house's location.
Rumahnya persis di sebelah taman.
His house is exactly next to the park.
Here, 'persis' indicates 'exactly' emphasizing the exactness of the manner in which the event occurred.
Peristiwa itu terjadi persis seperti yang diramalkan.
The event happened exactly as predicted.
In this context, 'persis' is used to express 'exact resemblance' between the subject's face and his father's.