固

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hard; strong; solid; sure; assuredly; undoubtedly; of course; indeed; admittedly

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Formation & memory

Break the character into parts you already know.

Phono-semantic compound (形声字)

囗 meaning “border” + 古 sound ( gǔ )

Components 囗古

solid · Heisig RSH #548

pent in + 古 ancient

Keyword method from Heisig's Remembering Simplified Hanzi.

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

Word	Pinyin	Meaning
固体物理	gù tǐ wù lǐ	solid state physics
固体食物	gù tǐ shí wù	solid foods; solids
固有名词	gù yǒu míng cí	proper noun
固安县	Gù ān Xiàn	Gu'an, a county in Langfang City 廊坊市[Lang2 fang2 Shi4], Hebei
固定电话	gù dìng diàn huà	fixed-line telephone; landline telephone
西固区	Xī gù Qū	Xigu, a district of Lanzhou City 蘭州市\|兰州市[Lan2 zhou1 Shi4], Gansu
固网电信	gù wǎng diàn xìn	landline (fixed-line) telecommunications
城固县	Chéng gù Xiàn	Chenggu, a county in Hanzhong City 漢中市\|汉中市[Han4 zhong1 Shi4], Shaanxi
固阳县	Gù yáng Xiàn	Guyang, a county in Baotou City 包頭市\|包头市[Bao1 tou2 Shi4], Inner Mongolia
固定点	gù dìng diǎn	fixed point; calibration point
固原市	Gù yuán Shì	Guyuan, prefecture-level city in Ningxia Hui Autonomous Region 寧夏回族自治區\|宁夏回族自治区[Ning2 xia4 …
固定收入	gù dìng shōu rù	fixed income
固有词	gù yǒu cí	native words (i.e. not derived from Chinese, in Korean and Japanese etc)
防风固沙	fáng fēng gù shā	sand break (in desert environment)
固形物	gù xíng wù	solid particles in liquid
固定资产	gù dìng zī chǎn	fixed assets
固定词组	gù dìng cí zǔ	set phrase
固定型思维	gù dìng xíng sī wéi	fixed mindset (as opposed to growth mindset)
固形量	gù xíng liàng	(Tw) (on packaging) drained weight
固化	gù huà	to solidify; to harden; (fig.) to make permanent; to become fixed

Characters sharing the sound component 古 — compare how they read.

Character	Pinyin	Meaning
古 sound part	gǔ	old, classic, ancient
苦	kǔ	bitter; hardship, suffering
胡	hú	recklessly, foolishly; wildly
居	jū	to live, to reside; to dwell; to sit
故	gù	reason, cause; happening, instance
估	gū	merchant; to estimate, to guess, to presume
咕	gū	mumble, mutter, murmur; rumble
鸪	gū	species of Taiwan pigeon
沽	gū	to buy and sell; of inferior quality
蛄	gū	mole cricket
辜	gū	crime, offense, sin
祜	hù	blessings, happiness, prosperity
怙	hù	to rely on; to presume; father (formal)
钴	gǔ	cobalt; clothes-iron
罟	gǔ	net, snare; to implicate
诂	gǔ	explanation; to comment, to explain
骷	kū	skeleton
嘏	gǔ	felicity, prosperity; large and strong
轱	gū	wheel; to revolve, to turn