immaturity
n. uncountablen. the state of being young or not fully developed. It can also describe a lack of good judgment or the ability to deal with adult problems.
n. the state of being young, undeveloped, or not yet fully grown. In a psychological context, it refers to a lack of emotional or intellectual development, often manifesting as poor judgment or an inability to handle responsibility.
His immaturity made it hard for him to take the criticism seriously.
The manager decided to delay the promotion because the candidate showed signs of emotional immaturity during the interview.
While the physical immaturity of the species is evident in its small size, the cognitive immaturity of the individual is what prevents it from surviving independently in the wild.
Borrowed from Latin immātūritātem.