This is the 97th most frequent Spanish word.
nueva
"Nueva" means "new" (feminine form).
In this sentence, 'nueva' functions as an adjective meaning 'new', describing the noun 'computadora' (computer).
Compré una nueva computadora.
I bought a new computer.
Here, 'nueva' also acts as an adjective but describes an abstract noun 'perspectiva' (perspective).
Esa es una perspectiva completamente nueva.
That is a completely new perspective.
In this example, 'nueva' describes a tangible noun 'tienda' (store) and indicates its recent establishment.