呆笨 Origin — Dong Chinese Dictionary

dāibèn

dimwitted

dāi dull, stupid

Depicts the mouth (口) being stuck and not moving, like wood (木), representing someone stupid or expressionless.

口 Iconic component

kǒu, kou mouth

木 Iconic component

mù tree

	Old Chinese
Zhengzhang	tɯː
	ŋɯː

Phonosemantic compound. ⺮ represents the meaning and 本 represents the sound.

⺮ Meaning component

zhú bamboo

⺮ is a component form of 竹.

本 Sound component

běn root

Regular Modern

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	Old Chinese
Zhengzhang	pɯːnʔ
	bɯːnʔ

《說文》：“笨，竹裏也。从竹，本聲。”