疑

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(bound form) to doubt; to suspect

Formation & memory

Break the character into parts you already know.

Ideographic compound (会意字)

An old man walking 疋 while holding 匕 a cane 矢

Components 匕矢疋 ? unknown part

doubt · Heisig RSH #2435

someone sitting on the ground + zoo + 矢 dart + chop — as a component also called: furled brow

Keyword method from Heisig's Remembering Simplified Hanzi.

The most common words first — learning a character in context makes it stick.

Word	Pinyin	Meaning
可疑分子	kě yí fèn zǐ	suspect; person under suspicion
疑心病	yí xīn bìng	excessive suspiciousness; (non-clinical) paranoia
深信不疑	shēn xìn bù yí	to believe firmly without any doubt (idiom); absolute certainty about sth
半信半疑	bàn xìn bàn yí	(idiom) half believing, half doubting; not quite convinced; skeptical
无可置疑	wú kě zhì yí	cannot be doubted (idiom)
疑问代词	yí wèn dài cí	interrogative pronoun (誰\|谁, 什麼\|什么, 哪兒\|哪儿 etc)
疑病症	yí bìng zhèng	hypochondriasis; hypochondria; also written 疑病[yi2 bing4]
心疑	xīn yí	to suspect
疑心	yí xīn	suspicion; to suspect
生疑	shēng yí	to start to have doubts; to grow suspicious
无疑	wú yí	undoubtedly; without doubt; for sure
必死无疑	bì sǐ wú yí	will die for sure; to be a goner
疑难杂症	yí nán zá zhèng	dubious or hard-to-treat cases (medicine); hard cases
多疑	duō yí	mistrustful; suspicious; paranoid
不容置疑	bù róng zhì yí	unquestionable
疑义	yí yì	a doubtful point
无容置疑	wú róng zhì yí	cannot be doubted (idiom)
疑点	yí diǎn	a doubtful point
可疑	kě yí	suspicious; dubious
起疑	qǐ yí	to begin to suspect; to grow suspicious

These characters use 疑 as their sound component — compare how they read.

Character	Pinyin	Meaning
疑 sound part	yí	to doubt, to question, to suspect
凝	níng	to coagulate, to congeal; to freeze
嶷	yí	a mountain range in Hunan province