gran·dil·o·quence 
(grăn-dĭlə-kwəns)
(grăn-dĭlə-kwəns)n.
Pompous or bombastic speech or expression.
[From grandiloquent, from Latin grandiloquus : grandis, great + loquī, to speak; see tolkw- in the Appendix of Indo-European roots.]
gran·dilo·quent adj.
gran·dilo·quent·ly adv.