This is the 17964th most frequent Polish word.
śledztwem
"Śledztwem" means "investigation" in English.
The word 'śledztwem' refers to the process of investigation conducted by the police; it is used in the instrumental case after the preposition 'ze' or 'z'.
Policja intensywnie zajmuje się śledztwem w sprawie kradzieży.
The police are intensively investigating the theft case.
Here 'śledztwem' is used in the instrumental case, illustrating participation or association with an investigative action.
Jego zaangażowanie w śledztwo pomogło rozwiązać sprawę.
His involvement in the investigation helped solve the case.
In this sentence, 'śledztwem' is employed in the instrumental form to indicate its relation to the subject of the discussion.