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bombastic

adjective
 
 
/bɒmˈbæs.tɪk/ US  /bɑːm-/

Definition

using long and difficult words, usually to make people think you know more than you do: a bombastic preacher a bombastic statementShowing arrogance and conceitConfidence and self-assuranceBoasting
(Definition of bombastic adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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