This is the 12553rd most frequent Polish word.
naprawił
"Naprawił" means "he/she/it repaired" or "fixed."
The word 'naprawił' is in its past tense form, masculine singular, and is used to indicate the action of repairing.
On naprawił komputer.
He repaired the computer.
The word 'naprawił' here highlights the completed action of the mechanic fixing something specific.
Ten mechanik naprawił silnik mojego samochodu.
This mechanic fixed my car's engine.
In this question, 'naprawił' is used to inquire about the person responsible for the act of repairing.