MAGNILOQUENT
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
magniloquent (comparative more magniloquent, superlative most magniloquent)
Speaking pompously; using deliberately long or esoteric words.
Synonyms: bombastic, tumid, grandiloquent, pompous
Synonyms
• fustian
• lexiphanic
Source: Wiktionary
Mag*nil"o*quent, a. Etym: [L. magnus great + loquens, -entis, p. pr.
of loqui to speak. See Magnitude, Loquacious.]
Definition: Speaking pompously; using swelling discourse; bombastic; tumid
in style; grandiloquent.
– Mag*nil"o*quent*ly, adv.
Source: Webster’s Unabridged Dictionary 1913 Edition