immature
🇬🇧/ˌɪməˈtjʊə(r)/ 🇺🇸/ˌɪməˈtʃʊr/Something or someone that is immature is not yet completely grown or fully developed. 未发育完全的; 不成熟的
adjective [原级] 发育未全的;(人)幼稚的,不成熟的;粗糙的
She is emotionally immature. 她在情感上不成熟。
She is emotionally immature. 她在情感上不成熟。