W: (adj) old [Indirect via young] ((used especially of persons) having lived for a relatively long time or attained a specific age) "his mother is very old"; "a ripe old age"; "how old are you?"
S: (adj) adolescent, jejune, juvenile, puerile (displaying or suggesting a lack of maturity) "adolescent insecurity"; "jejune responses to our problems"; "their behavior was juvenile"; "puerile jokes"
S: (adj) adolescent (in the state of development between puberty and maturity) "adolescent boys and girls"