Use 'orotundity' to describe unnecessarily grand speaking that can seem overbearing. His speech was criticized for its unwarranted orotundity, overshadowing the message.
Pro Tip 2/3
Not Always Positive
'Orotundity' can carry a negative connotation of being excessively showy or elaborate. Her orotundity in debates was both impressive and slightly obnoxious.
Pro Tip 3/3
Formal Situations
Best suited for formal or academic contexts where complex language is more acceptable. The keynote speaker's orotundity was fitting for the university commencement.