This is the 463rd most frequent Indonesian word.
sumatera
Sumatera (Sumatra): An island in western Indonesia, one of the largest islands in the world.
The word "Sumatera" is used as a proper noun referring to the geographical entity, the island called Sumatera.
Sumatera adalah pulau besar di Indonesia.
Sumatera is a large island in Indonesia.
Here, "Sumatera" is a modifier identifying the location of the forests, indicating possession or association.
Hutan Sumatera dikenal dengan keanekaragaman hayatinya.
The forests of Sumatera are known for their biodiversity.
In this use, "Sumatera" is part of the direct object of the verb, indicating a desired destination or place to visit.