He has an 'impressive' vocabulary for a 10-year-old.
a large and 'impressive' [='imposing'] building
Her first performance was very 'impressive'.
(..) You are a great man, and a hero. This I know to be true. Then you are as foolish as the rest of them! Very impressive, dear. But the armour suited you better when you were younger. I'm sure it did. Why don't you take that poor girl, and live out your remaining years in peace. (..)2007 Beowulf