infantile
🇺🇸
/ˈɪnfəntaɪl/
🇬🇧
/ˈɪnfəntaɪl/
adjective
R
behaving in a way that is typical of a very young child and not appropriate for an older person
His behavior was considered infantile by his peers.
彼の行動は同僚によって子供っぽいとされました。
R
relating to babies or very young children
The doctor specializes in infantile diseases.
その医師は乳幼児疾患に専門しています。
translation
乳幼児の