This is the 6302nd most frequent Portuguese word.
cândido
Pure, innocent, or sincere.
Here, 'cândido' is used to describe the smile as being pure, sincere, and unpretentious.
Ele tinha um sorriso cândido que iluminava o ambiente.
He had a candid smile that lit up the room.
'Cândido' is employed to express the protagonist's innocent and honest nature in childhood.
No conto, o protagonista era quando criança e, em sua essência, alguém cândido.
In the tale, the protagonist was as a child, and, in his essence, a candid person.
The adjective 'cândido' here portrays the eyes as exuding purity and calmness.