grownish

adj

1. Somewhat grown or mature; resembling or befitting a grown-up; adultish

   “She brushed past the dry blooms while she took his measure. So grown, thirteen and grownish, casually out for a stroll at three a.m.”

   “Correcting her grownish little one's sentence structure, “We 'have' been over this, or we've been over this. I didn't raise you to speak like trash, or smoke like trash. Let me smell your breath.””