How adjectives are built with na-, how they work in a sentence, and how to compare two things.
Many Ilokano adjectives are formed by adding na- to a root. pintás on its own is 'beauty'; add na- and it becomes napíntas, 'beautiful.'
dakkél
big, large
verified in this app's dictionary
sadút
lazy
verified in this app's dictionary
na- + píntas → napíntas
pretty, beautiful
A descriptive sentence just puts the adjective first, followed by the thing it describes — no separate word for "is."
Naánus diáy bakét.
The old woman is kind.
Nalamíis ditóy.
It is cool here.
weather/condition adjectives like this often have no subject at all
To compare, repeat the first syllable of the adjective (napíntas → napínpíntas, roughly "more beautiful") and follow the second thing being compared with ngem 'than'.
Napínpíntas diáy asáwak ngem diáy asáwam.
My wife is more beautiful than your wife.
Dákdakkélak ngem siká.
I am bigger than you.
Grammar: Ch. 3.2(c); Ch. 6.3; Ch. 11.3, from Constantino's Ilokano Reference Grammar (1971, CC BY-NC-SA 4.0).