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Adjective: orotund  'or-u,túnd or 'ó-ru,túnd [N. Amer], 'ó-ru,túnd [Brit]
  1. Ostentatiously lofty in style
    "a man given to orotund talk";
    - bombastic, declamatory, large, tumid, turgid
     
  2. (of sounds) full and rich
    "orotund tones";
    - rotund, round, pear-shaped

See also: full, rhetorical