未成熟的，青涩的

1. unripe, green

adjectival nouns or quasi-adjectives (keiyodoshi) noun (common) (futsuumeishi) nouns which may take the genitive case particle 'no'

缺乏经验，不够成熟，技术不熟练

2. inexperienced, immature, unskilled

noun (common) (futsuumeishi) nouns which may take the genitive case particle 'no' adjectival nouns or quasi-adjectives (keiyodoshi)