GRANDILOQUENT
grandiloquent, overblown, pompous, pontifical, portentous
(adjective) puffed up with vanity; “a grandiloquent and boastful manner”; “overblown oratory”; “a pompous speech”; “pseudo-scientific gobbledygook and pontifical hooey”- Newsweek
grandiloquent, magniloquent, tall
(adjective) lofty in style; “he engages in so much tall talk, one never really realizes what he is saying”
Source: WordNet® 3.1
Etymology
Adjective
grandiloquent (comparative more grandiloquent, superlative most grandiloquent)
(of a person, their language or writing) given to using language in a showy way by using an excessive amount of difficult words to impress others; bombastic; turgid
Synonyms
• (overly wordy or elaborate): See Thesaurus:verbose
Source: Wiktionary
Gran*dil"o*quent, a. Etym: [L. grandis grand + logui to speak.]
Definition: Speaking in a lofty style; pompous; bombastic.
Source: Webster’s Unabridged Dictionary 1913 Edition