Bombastic
bɒmˈbæstɪk
adjective
high-sounding but with little meaning; inflated
The word 'bombastic' originated from the Latin word 'bombasticus' meaning 'cotton'. Over time, it evolved to describe language that is overly stuffed or padded with superfluous words or phrases.
See how T. E. Lawrence uses "bombastic", with its meaning, pronunciation and a real book example.
Examples from books
He was introduced to Abd el Kader, who, sitting in pomp on the divan, made a bombastic speech, stating that the Sherif now took over Jebel Druse through his agency, and all existing officials were confirmed in their appointments.
T. E. Lawrence
Seven Pillars of Wisdom