This is the 14198th most frequent Russian word.
оригинальном
"Original."
Here, 'оригинальном' is used as an adjective describing the unique or distinctive style in which the story was written.
Этот рассказ был написан в оригинальном стиле.
This story was written in an original style.
In this sentence, 'оригинальном' is referring to the original, possibly intended lighting configuration of the painting.
Картина выглядит более эффектно в оригинальном освещении.
The painting looks more striking in the original lighting.
Here, 'оригинальном' is used to denote the original state or form of the document, implying it has not been altered.