bom ‧ bas ‧ tic /bɒmˈbæstɪk $ bɑːm-/ BrE AmE adjective
[ Date: 1700-1800 ; Origin: bombast 'bombastic language' (16-21 centuries) , from Old French bombace 'soft material for filling something' , from Medieval Latin bombax 'cotton' ]
bombastic language contains long words that sound important but have no real meaning:
He is best known for three rather bombastic poems.
—bombast /ˈbɒmbæst $ ˈbɑːm-/ noun [uncountable]