grandiloquent
adjective formal mainly disapproving uk/ɡrænˈdɪl.ə.kwənt/ us/ɡrænˈdɪl.ə.kwənt/
（尤指为了使某人或者某物显得重要而）卖弄词藻的，言辞浮夸的，过分华丽的
A grandiloquent style or way of using language is complicated in order to attract admiration and attention, especially in order to make someone or something seem important.
Her speech was full of grandiloquent language, but it contained no new ideas. 她的演讲虽然充满了华丽的词藻，但却没有什么新意。