infantileadjective
uk/ˈɪn.fən.taɪl/us/ˈɪn.fən.təl/disapprovingtypical of a child and therefore unsuitable for an adult:
infantile behaviour
Thesaurus: synonyms and related words
Physically and mentally mature & immature
- adult
- ageing
- aging
- an old/a wise head on young shoulders idiom
- babyish
- grown
- grown up
- head
- immature
- juvenile
- make a man (out) of sb idiom
- mature
- maturity
- overgrown
- petulant
- precocious
- precociously
- puerile
- retarded
- young
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