This is the 545th most frequent Finnish word.
toiselle
"Toiselle" means "to the other" in English.
In this sentence, 'toiselle' refers to 'toinen,' specifying another distinct entity or group.
He huusivat toiselle ryhmälle varoituksen.
They shouted a warning to the other group.
Here, 'toiselle' is used to describe the endpoint of the movement to a different entity than the original.
Siirsimme kirjan yhdeltä pöydältä toiselle.
We moved the book from one table to another.
"Toiselle" is used here as a partitive form of "toinen" (another/second) to indicate a receiver (to another).