夏虫疑氷（かちゅうぎひょう）

Japanese vocabulary

Meaning: being narrow-minded due to limited experience; refusing to believe in things outside of one's own limited experience; a summer insect doubts the existence of ice

See it used in real works

• Example sentences from Japanese novels & web fiction (Massif)
• Hear “夏虫疑氷” pronounced in real videos (YouGlish)