摸底 Origin — Dong Chinese Dictionary

mōdǐ

fact-finding

mō, mo touch with hand

Phonosemantic compound. 扌 represents the meaning and 莫 represents the sound.

扌 Meaning component

shou, shǒu hand

扌 is a component form of 手.

莫 Sound component

mò, mo do not

	Old Chinese
Zhengzhang	maː
	maːɡ

Phonosemantic compound. 广 represents the meaning and 氐 represents the sound.

广 Meaning component

guǎng roof

dī, dǐ, zhī bottom

Regular Modern

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	Middle Chinese	Old Chinese	Gloss
Baxter-Sagart	tejX	tˤijʔ	bottom; stop, obstruct

《說文》：“底，山居也。一曰下也。从广，氐聲。”