This is the 12714th most frequent Polish word.
niepodleg
The word "niepodleg" is not a standalone word in Polish; it may be a fragment of "niepodległość," which means "independence" in English.
The word 'niepodległość' means 'independence', derived from 'nie' (not) and 'podlegać' (to be subject to).
Niepodległość Polski została odzyskana w 1918 roku.
The independence of Poland was regained in 1918.
Here, 'niepodległy' functions as an adjective, meaning 'independent'.
Naród niepodległy nie podlega władzy obcej.
An independent nation is not subject to foreign authority.
In this sentence, 'niepodległa' is used as an adjective describing Poland as 'independent'.