Answer: sesquipedalian

AnswerCrossword Clue
SESQUIPEDALIANLong, as words.
SESQUIPEDALIANGiven to using long words
SESQUIPEDALIANPolysyllabic
sesquipedaliana polysyllabic word also SESQUIPEDAL
sesquipedalianCharacterized by long words; long-winded
sesquipedalian(of a word) Polysyllabic; long