Characteristic of a baby.

Indicating a lack of maturity; SYN. infantile.
1. Of, relating to, or befitting a child or childhood
2. Marked by or suggestive of immaturity and lack of poise
3. Lacking complexity; simple
4. Deteriorated with age especially in mind; senile

1. Befitting a young child; SYN. childly.
2. Exhibiting childlike simplicity and credulity; SYN. dewey-eyed, simple.

ETYM Latin filialis, from filius son, filia daughter; akin to e. female, feminine. Related to Fitz.
1. Relating to or characteristic of or befitting an offspring.
2. (Genetics) Designating the generation or the sequence of generations following the parental generation.

ETYM Latin puerilis, from puer a child, a boy: cf. French puéril.
Of or characteristic of a child; childish.

In a child-like manner.

In a filial manner.

In a puerile manner; childishly.