grown-up

adjective
1
mentally and physically an adult
بزرگسال, بالغ
synonym adult
2
suitable for or typical of an adult
بزرگسال, بالغ, مخصوص بزرگسالان
The child was clearly puzzled at being addressed in such a grown-up way.
noun
1
an adult person
بزرگسال, آدم بالغ
synonym adult