This is the 266th most frequent Polish word.
łodzi
"Łodzi" is the genitive or locative form of "łódź," meaning "boat" or referring to the city of Łódź in Poland.
Here, 'łodzią' is the instrumental case of 'łódź', referring to the means by which the action was performed (by boat).
Pływaliśmy łodzią po jeziorze.
We were sailing a boat on the lake.
Here, 'łodzi' is used in the genitive singular to indicate possession or linkage (to the boat).
Zgubiłam klucz do łodzi.
I lost the key to the boat.
In this sentence, 'łodzi' is in the genitive plural form, describing boats collectively visible at the port.