high–flown 
/ˈhaɪˈfloʊn/ adjective
/ˈhaɪˈfloʊn/ adjective [more high–flown; most high–flown] disapproving : using fancy words that are meant to sound important and impressive
▪ Her books are filled with abstract ideas and high-flown language. ▪ high-flown rhetoric
▪ Her books are filled with abstract ideas and high-flown language. ▪ high-flown rhetoric
