This is the 3380th most frequent Arabic word.
فلسطينيا
"فلسطينيا" means "Palestinian" in English.
Here, "الفلسطيني" (Palestinian) is an adjective describing "العلم" (flag), showing association.
علقت العلم الفلسطيني على جدار غرفتي.
I hung the Palestinian flag on the wall of my room.
Here, "فلسطينيًا" (Palestinian) is in the accusative case and modifies "صديقي" (my friend), indicating nationality.
كان صديقي فلسطينيًا يعيش في مدينة القدس.
My friend was a Palestinian living in the city of Jerusalem.
In this sentence, "فلسطينية" (Palestinian) is a feminine adjective describing "شاعرة" (poetess), indicating origin and gender.