immature

Mature eggs could be fertilized immediately after acquisition, while immature eggs needed to be matured before fertilization.

Mark Heywood KC, defending Alesbrook, said the defendant was "very young and very immature" at the time of the offences, but was "capable of being a very caring father figure".

When her friend asks her to underage drink under a bridge, she begrudges teenagers to Paul because "they all act so immature."

Because people are immature and they get upset about things!

She also taught the pupil, and said that there had been some problems with behaviour, saying she could be “immature” and “either really happy or moody”.