This is the 773rd most frequent Indonesian word.
sesuatu
"Something."
In this sentence, "sesuatu" functions as an indefinite pronoun, indicating an unspecified object.
Saya ingin mengatakan sesuatu yang penting.
I want to say something important.
Here, "sesuatu" is used to denote an unknown or unspecified object that is being searched for.
Dia mencari sesuatu di kamarnya sepanjang malam.
He was looking for something in his room all night long.
In this case, "sesuatu" stands for an unspecified finding or item that evokes surprise.