This is the 1783rd most frequent Portuguese word.
ideal
Perfect or most suitable; a standard of perfection.
Here, 'ideal' is used as a noun to describe the best possible option or scenario.
Esse lugar é perfeito para as férias, é o ideal.
This place is perfect for a vacation, it's ideal.
In this sentence, 'ideal' is an adjective describing the favorable state of the weather.
O clima está ideal para um passeio ao ar livre.
The weather is ideal for an outdoor walk.
'Ideal' here is an adjective referring to the concept of the perfect or most suitable solution.