怪癖 Origin — Dong Chinese Dictionary

guàipǐ

eccentricity

guài strange

Phonosemantic compound. 忄 represents the meaning and 圣 represents the sound.

忄 Meaning component

xin, xīn heart

忄 is a component form of 心.

圣 Sound component

shèng sage, holy

Change in sound

怪 and 圣 don't sound similar in modern Mandarin due to historical phonetic changes. They were more similar in Old Chinese.
怪 *kruːds
圣 *kʰuːd

Regular Modern

▼ More ▲ Less

	Middle Chinese	Old Chinese	Gloss
Baxter-Sagart	kweajH	[k]ʷˤrə-s	extraordinary

《說文》：“怪，異也。从心，圣聲。”

Phonosemantic compound. 疒 represents the meaning and 辟 represents the sound.

疒 Meaning component

nè sick

辟 Sound component

pì, bì law

	Old Chinese
Zhengzhang	pʰeɡ
	pʰeːɡ