This is the 10335th most frequent German word.
prisong
It seems "prisong" is not a German word.
'Prisong' refers here to an older, poetic or outmoded term for a concept, possibly to describe luminescence or brightness.
Die alte Straßenlaterne hatte einst viel Prisong.
The old street lantern once had much prisong.
In this sentence, 'prisong' metaphorically represents the quality of brilliance or excellence.
Seine Rede strahlte einen gewissen Prisong aus.
His speech radiated a certain prisong.
Here, 'prisong' is used to denote a touch of elegance or refinement in the artistic expression.