pompous

Affectedly grand, solemn, or self-important; displaying an exaggerated sense of one's own importance.

• pomposity/pɒmˈpɒsɪti/(n)自大
• pompously(adv)自大地

• pompous speech
• pompous attitude
• pompous fool
• pompous tone
• pompous official

1. 1.The pompous bureaucrat insisted on being addressed by his full title at all times. (self-important)
2. 2.His pompous writing style — full of unnecessarily complex words — obscured rather than illuminated his ideas. (pretentiously grand)

• pretentious/prɪˈtɛnʃəs/— trying to appear more important than one is
• arrogant/ˈærəɡənt/— having an exaggerated sense of self-worth
• grandiose/ˈɡrændiˌoʊs/— impressive or ambitious in scale — often negatively

from Latin "pomposus" (stately) — "pompa" (procession, display) from Greek "pompe" (a sending, a solemn procession)