Infantile

/ˈɪn.fən.taɪl/

Meaning & Definition

adjective
Characteristic of or suitable for an infant; childish.
His infantile behavior during the meeting frustrated his colleagues.
Displaying a lack of maturity; overly simplistic or naive.
The argument presented was so infantile that it hardly warranted a response.
Relating to infants or early childhood.
The nursery was decorated with infantile motifs to create a welcoming environment for the babies.

Etymology

From Latin 'infantilis', from 'infans' meaning 'unable to speak'.

Common Phrases and Expressions

infantile antics
Childish or silly actions that are not appropriate for adults.
infantile games
Simple and childish games that are typically played by very young children.

Related Words

infancy
The state of being an infant; early childhood.
infant
A very young child, especially one less than a year old.
infantile paralysis
A viral disease causing temporary or permanent paralysis, also known as polio.

Slang Meanings

Acting in a childish manner.
Stop being so infantile and take this seriously.
Being emotionally immature.
His responses are just infantile; he needs to grow up.