This is the 349th most frequent Portuguese word.
simples
Simple.
Here, 'simples' is used as an adjective meaning 'easy' or 'straightforward', describing how solving the problem does not require complexity.
A solução para o problema é muito simples.
The solution to the problem is very simple.
In this sentence, 'simples' works as an adjective and emphasizes minimalism or lack of sophistication when describing a preference for something.
Prefiro algo mais simples e menos elaborado.
I prefer something simpler and less elaborate.
Here, 'simples' acts as an adjective describing a lifestyle characterized by modesty or lack of extravagance.