underkind
/ˌʌndərˈkaɪnd/Definitions
1. noun
A person who is too young to be considered adult, especially in a legal or social sense.
“As a minor, the underkind was not held liable for the damages.”
2. adjective
Young, especially in a way that is seen as immature or lacking in experience.
“The underkind artist struggled to express himself through his paintings.”