This is the 14406th most frequent Russian word.
отремонтировал
Repaired.
'Отремонтировал' here again is in the past tense but used in indirect speech to report an action.
Он сказал, что отремонтировал часы.
He said that he repaired the watch.
'Отремонтировали' is in the plural past tense, showing that the action was performed by multiple individuals.
Мы отремонтировали забор вместе.
We repaired the fence together.
'Отремонтировал' is used as a past tense verb indicating the completion of the action of repairing.