This is the 6331st most frequent Russian word.
фактической
"Actual" or "factual."
Here, the word 'фактической' is used as an adjective to describe the nature of the discovery—indicating it is real and actual.
Фактической находкой данной экспедиции стало древнее поселение.
The factual discovery of this expedition was the ancient settlement.
In this sentence, 'фактической' modifies 'владелицей' to clarify that the ownership is factual, lacking formal paperwork or documentation.
Она оказалась фактической владелицей картинной галереи без официальных документов.
She turned out to be the factual owner of the art gallery without official documents.
Here, 'фактической' specifies the nature of the cause, establishing it as the actual reason behind the incident.