immaturity
youthfulness / childishness / unripeness
Noun
This term describes a state of incompleteness, whether biological or psychological. When applied to humans, it often carries a negative connotation of childishness or a failure to develop expected social and emotional skills, suggesting a gap between chronological age and behavioral maturity. In botanical contexts, the word is neutral and technical, referring specifically to the physiological stage of a plant or fruit before it reaches ripeness. It is an uncountable noun and does not have a plural form, as it describes an abstract state or quality.
Meanings
Noun
The state of being young or not yet fully developed physically or mentally.
"The kitten showed its immaturity by chasing its own tail."