فلسطينيا

In a sentence

• كان صديقي فلسطينيًا يعيش في مدينة القدس.

  My friend was a Palestinian living in the city of Jerusalem.

  Here, "فلسطينيًا" (Palestinian) is in the accusative case and modifies "صديقي" (my friend), indicating nationality.

• قرأت مقالًا عن شاعرة فلسطينية وإسهاماتها الأدبية.

  I read an article about a Palestinian poetess and her literary contributions.

  In this sentence, "فلسطينية" (Palestinian) is a feminine adjective describing "شاعرة" (poetess), indicating origin and gender.

• علقت العلم الفلسطيني على جدار غرفتي.

  I hung the Palestinian flag on the wall of my room.

  Here, "الفلسطيني" (Palestinian) is an adjective describing "العلم" (flag), showing association.