immature
🇺🇸
/ˌɪməˈtʃʊr/
🇬🇧
/ˌɪməˈtjʊə(r)/
adjective
R
acting in a silly way like a child
His immature jokes made the meeting less serious.
彼の未熟な冗談で会議が深刻さを欠いた。
R
not fully grown or developed
The immature fruit is still green and hard.
未熟な果実はまだ緑色で硬い。
translation
子供っぽい行動, 未成熟