keskittyneellä
"keskittyneellä" is the adessive case of the Finnish word "keskittynyt". In Finnish grammar, the adessive case typically indicates location, possession, or the means by which something is done. Therefore, "keskittyneellä" can translate to phrases like "on concentrated", "by concentrated", or "with concentrated".
The root word "keskittynyt" is the past passive participle of the verb "keskittyä", meaning "to concentrate" or
For example, in a sentence like "Hän työskenteli keskittyneellä ilmeellä" (He worked with a concentrated expression),