This is the 821st most frequent Indonesian word.
rata
"Rata" in Indonesian means "flat" or "even" in English.
In this sentence, 'rata' describes the flatness or smoothness of a surface.
Permukaan meja itu sangat rata.
The surface of the table is very flat.
Here, 'rata-rata' is used to indicate an average or mean value.
Nilai ujian kelas tersebut rata-rata tinggi.
The test scores of that class are on average high.
In this case, 'rata' signifies the evenness or leveled condition of the road.