This is the 828th most frequent Arabic word.
اليمنية
"The Yemeni" (feminine adjective or noun referring to something or someone from Yemen).
Here, "اليمنية" describes the family as originating from Yemen, used as an adjective in feminine form.
تقيم الأسرة اليمنية حفلة في المنزل.
The Yemeni family organizes a party at home.
In this sentence, "اليمنية" is used as an adjective describing the noun "الطائرة" (airplane), indicating its association with Yemen, and agrees in gender with it.
الطائرة اليمنية تغادر المطار في الصباح.
The Yemeni airplane departs the airport in the morning.
"اليمنية" in this context describes "المأكولات" (cuisine), indicating the national origin of the dishes, and agrees in gender and number.