This is the 1870th most frequent Polish word.
legii
"Legii" is the genitive or dative form of "Legia," which typically refers to the Polish football club Legia Warsaw.
In this sentence, 'legii' is the dative form of 'legia', referring to a legion, specifically in an organizational or group context.
Dołączyłem do legii cudzoziemskiej.
I joined the foreign legion.
Here, 'legii' is the genitive singular form of 'legia', indicating possessive or descriptive association with legions.
Muzeum prezentuje historię legii rzymskich.
The museum showcases the history of Roman legions.
In this context, 'legii' is used in the genitive singular to describe a specific named legion.