immature
Translation
immature, childish, undeveloped
Examples
His behavior was very immature for his age.
His behaviour was very immature for his age.
The fruit is still immature and not ready to eat.
The fruit is still immature and not ready to eat.
Grammar Patterns
((sb./sth.)) is immature (sb./sth.) is not fully developed or is childish He is immature for his age.
Similar Words
Synonyms: childish, juvenile, undeveloped; Antonyms: mature, adult, developed
Etymology
From 'in-' (not) + 'mature'. Literally 'not mature'.
Memory Tips
The prefix 'im-' often means 'not'. So, it's easy to remember this as 'not mature'.