This is the 724th most frequent Lithuanian word.
pačiam
"Pačiam" means "to oneself" or "by oneself" (masculine, dative case).
In this sentence, 'pačiam' emphasizes the first person doing an action independently.
Aš viską padariau pačiam.
I did everything myself.
Here, 'pačiam' serves to emphasize the singular bravest soldier being referenced.
Šis iššūkis buvo sunkus net pačiam drąsiausiam kareiviui.
This challenge was difficult even for the bravest soldier.
In this context, 'pačiam' highlights that the king is the main focal point of the statement.