This is the 3486th most frequent German word.
kriegsgefangene
"Prisoner of war."
Here, 'kriegsgefangene' is an adjective describing the state of the soldier, indicating 'prisoner of war'.
Der kriegsgefangene Soldat wurde in einem Lager untergebracht.
The prisoner of war soldier was housed in a camp.
In this sentence, 'Kriegsgefangene' functions as a noun referring to the collective group of individuals who are prisoners of war.
Viele Kriegsgefangene wurden nach dem Krieg aus ihrer Gefangenschaft entlassen.
Many prisoners of war were released from captivity after the war.
Here, 'Kriegsgefangenen' is the plural genitive form of the noun 'Kriegsgefangener', relating to their rights.