あかakanぼうbouあかakanbo
1.

A very young child who has recently been born, typically characterized by their dependence on caregivers and the need for nurturing.

2.

A term used to describe someone who is inexperienced or naive, often implying a level of immaturity or childishness in personality or behavior.

3.

A colloquial expression for a newborn, often evoking notions of vulnerability and innocence associated with early childhood stages.

Example:

うちの赤ん坊は口をきくようになってきました。