This is the 2725th most frequent Polish word.
dotychczasowy
"Dotychczasowy" means "up to now," "previous," or "existing so far."
Here, 'dotychczasowy' is used to describe the person who held the position of manager up until now.
Dotychczasowy kierownik działu postanowił odejść na emeryturę.
The previous manager of the department decided to retire.
In this sentence, 'dotychczasowe' refers to the results achieved up to the present time.
Dotychczasowe wyniki projektu są bardzo obiecujące.
The results of the project so far are very promising.
The word 'dotychczasowy' here qualifies the existing level of knowledge as per its state until the current time.