This is the 12763rd most frequent Portuguese word.
vaidosa
"Vaidosa" means "vain" or "self-centered."
In this sentence, 'vaidosa' describes someone's personality trait of being concerned about their looks.
Ela é muito vaidosa e gosta de cuidar da sua aparência.
She is very vain and likes to take care of her appearance.
Here, 'vaidosa' is used to highlight a characteristic of pride and self-interest to please others.
Aquela cantora vaidosa sempre se esforça para impressionar sua audiência.
That vain singer always strives to impress her audience.
In this context, 'vaidosa' metaphorically describes the proposal as overly self-regarding or ambitious.