大人とも子供ともつかない年頃の英語

Children grow up someday.

of the treatment or handling of children, being of the same manner or treatment as that of the treatment of adults

of a young person, showing unusually early development of mind or body

an adult who is sexually attracted to children

the period of growth between childhood and adulthood, called adolescence

They aren't children any more, but not adults yet.

the action of treating or handling children in the same manner as one treats or handles an adult

to be precocious and unchildlike

the state of a child between infancy and adolescence

of an adult, being childish and disgraceful

I don't want to grow up.

a young child who is small for his age

A boy grows into a man.

As a man grows older, he will grow in moderation.

You are quite grown up.

a girl who is childish despite having attained a marriageable age

He has moderate views.

of someone or something, being advanced in age

the childhood of a boy

I didn't expect to become this sort of adult...

He holds moderate views.

Our children are grown.

That child talks as if he were an adult.

reach manhood

a young person who unsuccessfully tries to act like an experienced adult

to grow up―attain man's estate―arrive at manhood―（女なら）―arrive at womanhood

“Old age is second childhood.”【イディオム・格言的】

The child talks as if he were a man.

Don't grow up. It's a trap!

of humans, the time of youth