This is the 297th most frequent Indonesian word.
usaha
"Usaha" means "effort" or "business" in English.
The word "usaha" here refers to 'a business' or 'a commercial activity' that he operates.
Dia menjalankan usaha toko kelontong di desanya.
He runs a small convenience store business in his village.
In this sentence, "usaha" signifies 'effort' or 'attempts' to achieve something.
Mencapai tujuan itu membutuhkan banyak usaha.
Reaching that goal requires a lot of effort.
Here, the derived verb "berusaha" means 'to try' or 'to make an effort' to accomplish a task.