This is the 778th most frequent Croatian word.
samom
"Samom" means "to/by/with myself" or "to/by/with itself" depending on context.
Here, 'samom' is the dative form of the emphatic pronoun 'sam' referring to one's own self.
Ponosim se samom sobom.
I am proud of myself.
In this sentence, 'samom' emphasizes the inherent or essential nature of the 'nature of things'.
To je povezano samom prirodom stvari.
This is related to the very nature of things.
In this context, 'samom' is used reflexively in an adverbial sense.