套筒 Origin — Dong Chinese Dictionary

tàotǒng

casing

tào cover

A cover has to be big (大) and long (镸) enough to wrap around what it is covering.

Components

大 Meaning component

dà, dài big

镸 Meaning component

cháng long

镸 is a component form of 長.

Historical Pronunciations

	Old Chinese
Zhengzhang	tʰaːw
	tʰaːws

Sources

Character origin: 漢語多功能字庫
Readings & variants: Unicode
Historical pronunciations: Zhengzhang Shangfang

tǒng thick piece of bamboo

Phonosemantic compound. ⺮ represents the meaning and 同 represents the sound. Originally written as 同.

Components

⺮ Meaning component

zhú bamboo

⺮ is a component form of 竹.

同 Sound component

tóng, tong, tòng together

Character Evolution

Seal form — Seal Shuowen ~100 AD

Regular Modern

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Historical Pronunciations

	Middle Chinese	Old Chinese	Gloss
Baxter-Sagart	duwng	lˤoŋ	tube
Zhengzhang		doːŋ
		doːŋs
Unicode	dhung

說文解字

通簫也。从竹同聲。

Sources

Readings & variants: Unicode
Historical pronunciations: Baxter-Sagart Zhengzhang Shangfang
Historical images: Academia Sinica
Etymology: Shuowen Jiezi (說文解字)