archaism
🇺🇸
/ˈɑːrkiɪzəm/
🇬🇧
/ˈɑːkeɪɪzəm/
A word or style that is very old or old-fashioned.
The professor's lecture was filled with archaisms that made it hard to understand.
教授的讲座充满了使人难以理解的古语。