This is the 300th most frequent Czech word.
tří
The Czech word "tří" is the genitive singular or accusative plural form of the number "three" (tři).
In this sentence, 'tří' is part of the genitive case form of 'tři', used to describe ordinal numbers.
Jsem student třetího ročníku střední školy.
I am a student in the third year of high school.
Here, 'tři' is used as a cardinal number to indicate the amount.
Po rozdělení nám zůstaly přibližně tři části.
After the division, we were left with approximately three parts.
In this sentence, 'tři' again functions as a cardinal number modifying the object 'hares'.