This is the 11979th most frequent Polish word.
kętrzyńskiego
"Kętrzyńskiego" means "of or relating to Kętrzyński," typically referring to something associated with the town of Kętrzyn in Poland or the name Kętrzyński.
The term 'Kętrzyńskiego' is used here as a proper noun referring to a street named after Kętrzyński, a figure or entity.
Spacerowaliśmy ulicą Kętrzyńskiego wczoraj wieczorem.
We walked down Kętrzyński Street last evening.
In this sentence, 'Kętrzyńskiego' refers to the contributions or works associated with a scholar named Kętrzyński.
Wiele szkół korzysta z dorobku naukowego profesora Kętrzyńskiego.
Many schools utilize the scientific achievements of Professor Kętrzyński.
The term 'Kętrzyńskiego' is denoting a person named Kętrzyński, as the events are held to commemorate them.