adjective Date: before 12th century of, relating to, or befitting a child or childhood, 2. marked by or suggestive of immaturity and lack of poise , lacking complexity ; simple , deteriorated with age especially in mind ; senile , ~ly adverb ~ness noun
CHILDISH
Meaning of CHILDISH in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012