pompous
adj
(derog 贬) feeling, or showing that one feels, that one is much more important than other people 自大的; 自负的; 浮夸的
a pompous official 自命不凡的官员
pompous language, ie full of high-sounding words 浮夸的语言.
Although mankind has undergone no general improvement in intelligence or morality, it has made extraordinary progress in the accumulation of knowledge.