This is the 138th most frequent Ukrainian word.
нові
"Нові" means "new" (plural) in English.
In this sentence, 'нові' is used as an adjective describing 'книги' (books), indicating their recent condition or novel nature.
Ми купили нові книги.
We bought new books.
Here, 'нові' describes 'ідеї' (ideas), showing their innovativeness or originality.
Нові ідеї часто змінюють світ.
New ideas often change the world.
In this case, 'нові' modifies 'комп'ютери' (computers), again reflecting their state of being 'new' or recently acquired.