This is the 9899th most frequent Polish word.
anektowanego
"Annexed."
In this sentence, 'anektowanego' is used in the past tense passive form to describe a territory that was annexed by another state.
To było terytorium anektowanego przez inne państwo.
This was the territory annexed by another country.
Here, 'anektowanego' functions as a past participle describing the region that was annexed during a historical period.
Historia opowiada o skarbie ukrytym w regionie anektowanego w średniowieczu.
The story tells about a treasure hidden in a region annexed in the Middle Ages.
In this case, 'anektowanego' modifies the noun 'obszaru' (area), indicating its status as having been annexed.