Grandiloquent

/ɡrænˈdɪl.ə.kwənt/ adjective hard

Using extravagant, pompous language meant to impress rather than communicate clearly.

The grandiloquent toast went on for fifteen minutes, full of fancy words but light on genuine feeling.

Memory Trick

'Grand' plus 'loqu' (speech, as in 'eloquent') — grandiloquent language tries so hard to sound grand that it piles on big words just to impress.