This is the 12742nd most frequent Polish word.
niesamowicie
"Extremely" or "incredibly."
The word 'niesamowicie' is used as an adverb to intensify the adjective 'wzruszający', meaning 'moving'.
Ten film był niesamowicie wzruszający.
That movie was incredibly moving.
Here, 'niesamowicie' functions as an adverb enhancing 'utalentowanym', which describes Mariusz's skills as a musician.
Mariusz jest niesamowicie utalentowanym muzykiem.
Mariusz is an incredibly talented musician.
In this sentence, 'niesamowicie' serves as an adverb to emphasize the brightness described by the adjective 'jasne' (bright).