This is the 6955th most frequent Portuguese word.
infantino
"Infantino" means "childish" or "related to infants/children."
Here, 'infantilino' is used to describe childish or naive behavior, often in a critical or humorous manner.
O comportamento dele era completamente infantilino ao reclamar por tão pouco.
His behavior was completely childish when complaining about so little.
In this sentence, 'infantilino' describes a pure, innocent quality associated with the happiness of a child.
O sorriso infantilino da criança ao ganhar o presente era encantador.
The child's innocent smile upon receiving the gift was charming.
'Infantilino' here refers to an unpolished or naive style, reminiscent of young or inexperienced artists.