This is the 18003rd most frequent Russian word.
философских
"Философских" means "philosophical" in English.
Used as an adjective to describe systems related to philosophy.
Он занимается изучением философских систем.
He studies philosophical systems.
Used as an adjective to describe academic fields pertaining to philosophy.
В университете я посещал лекции по философских дисциплинах.
At the university, I attended lectures on philosophical disciplines.
Used as an adjective to modify contemplations relating to philosophy.