He has an 'impressive' vocabulary for a 10-year-old.
a large and 'impressive' [='imposing'] building
Her first performance was very 'impressive'.
(..) When the Shadow of Mordor reaches this city... ...it will begin. Well... ...Minas Tirith... ...very impressive. - So where are we off to next? - Oh, it's too late for that, Peregrin. There's no leaving this city. Help must come to us. It must be getting near teatime. (..)2003 The Lord of the Rings: The Return of the King