外泄 Origin — Dong Chinese Dictionary

wàixiè

leak

wài outside

Phonosemantic compound. 卜 represents the meaning and 月 represents the sound.

Components

卜 Iconic component

bo fortune telling

Depicts the cracks on the outside of a turtle shell.

月 Sound component

yuè, yue moon

Looks like 夕, which is also a pictograph of a moon.

Change in sound

外 and 月 don't sound similar in modern Mandarin due to historical phonetic changes. They were more similar in Old Chinese.
外 *[ŋ]ʷˤa[t]-s
月 *[ŋ]ʷat

Change in form

Due to historical stylistic changes, this component is less similar to 月 than it was in ancient scripts.

Character Evolution

Bronze form — Bronze Early Western Zhou ~1000 BC

Seal form — Seal Warring States (Chu) 475-221 BC

Regular Modern

▼ More ▲ Less

Historical Pronunciations

	Middle Chinese	Old Chinese	Gloss
Baxter-Sagart	ngwajH	[ŋ]ʷˤa[t]-s	outside

說文解字

《說文》：“外，遠也。卜尚平旦，今夕卜，於事外矣。，古文外。”

Sources

Character origin: 季旭昇《說文新證》p.555-556漢語多功能字庫
Readings & variants: Unicode
Historical pronunciations: Baxter-Sagart
Historical images: Academia Sinica
Etymology: Shuowen Jiezi (說文解字)

xiè leak

Phonosemantic compound. 氵 represents the meaning and 世 represents the sound. Simplified form of 洩.

Components

氵 Meaning component

shui, shuǐ water

氵 is a component form of 水.

世 Sound component

shì generation

Character Evolution

Regular Modern

▼ More ▲ Less

Historical Pronunciations

	Middle Chinese	Old Chinese	Gloss
Baxter-Sagart	sjet	s-lat	leak, ooze
	yejH	lat-s	leak, ooze
Zhengzhang		lebs
		sled
Unicode	siɛt

說文解字

水。受九江博安洵波，北入氐。从水丗聲。

Sources

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

外 wài outside

Components

Character Evolution

Historical Pronunciations

說文解字

Sources

泄 xiè leak

Components

Character Evolution

Historical Pronunciations

說文解字

Sources

wài outside

xiè leak