This is the 9753rd most frequent Turkish word.
arsaları
"Arsaları" means "their plots of land" in English.
The word 'arsaları' is used here to refer to 'lands' or 'plots' belonging to families, in the plural and with the possessive (third person plural) suffix 'ları'.
Bu köyde geniş arsaları olan aileler zengin sayılır.
In this village, families with large lands are considered wealthy.
The word 'arsaları' refers to 'lands' or 'plots', taking the direct object marker ('ı'). It is in the plural form indicating multiple plots.
Belediye, yeni projeler için kullanılacak arsaları belirledi.
The municipality has designated lands to be used for new projects.
Here 'arsaları' indicates 'plots of land', with the accusative marking 'ı' showing the object of the sentence, in addition to being in plural form.