(1)成熟が欠如しているの特徴
(2)十分な成長の欠如を示すさま
(3)indicating a lack of maturity; "childish tantrums"; "infantile behavior"
(4)characteristic of a lack of maturity; "immature behavior"
さらに詳しく
(1)良識か判断力に欠けている
(2)devoid of good sense or judgment; "foolish remarks"; "a foolish decision"
