This is the 3979th most frequent Polish word.
tunezji
The Polish word "Tunezji" means "Tunisia" (in the locative or dative case).
In this sentence, 'Tunezji' is used as the locative case of 'Tunezja', indicating location.
Byłem w Tunezji zeszłego lata.
I was in Tunisia last summer.
Here, 'Tunezji' is in the genitive case, showing direction towards or plan of action involving Tunisia.
Planuję podróż do Tunezji.
I am planning a trip to Tunisia.
In this case, 'Tunezji' is again used in the locative case, indicating location.