This is the 179th most frequent Malay word.
berusia
"Berusia" means "aged" or "of age" in English.
The word 'berusia' is used to indicate age in a quantified manner.
Dia berusia dua puluh tahun.
He is twenty years old.
Here, 'berusia' describes the age of an object, specifically the tree.
Pokok itu berusia lebih seratus tahun.
That tree is more than a hundred years old.
In this context, 'berusia' is employed to set an age range for a specific group of individuals.