HanziGuru.础 · chǔ
础
chǔ[chu3]Tone 3

foundation

HSK 3
Guru Deep Dive

English · foundation

Cached lesson
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Topology:Left-right
Strokes:18
Writing Balance Rule: Keep the left radical (石) compact and narrow, and allot slightly more horizontal width to the right phonetic component (出) so the entire character looks stable and balanced.
Simplification Logic: The traditional form 礎 uses 歺 for the phonetic component on the right, which was simplified to 出 in the modern Chinese character set.

foundation, base, plinth under a pillar

basis, groundwork
NounFormalBound morpheme#architecture#abstract concepts#construction
Sample Usage
  • 这座建筑的基础很牢固。
    zhè zuò jiàn zhù de jī chǔ hěn láo gù.
    The foundation of this building is very solid.
  • 我们要打好学习的基础。
    wǒ men yào dǎ hǎo xué xí de jī chǔ.
    We need to build a good foundation for our studies.
/[t͡ʂʰu²¹⁴]/Tone: 214
础
chǔchu3
++
ˇ(214)
=chǔ
Initial Consonant
ch
Type: Aspirated Retroflex
Sounds like: ch sound with retroflex tongue position
AspiratedRetroflex
Airflow Tactile Test: Both curled tongue AND explosive puff of air! Tissue MUST fly.
Tongue & Mouth Position: Tongue tip curled back near the hard palate
Final Rhyme
u
Vowel Group: -u vowel group
Sounds like: oo sound as in 'boot'
Mouth Shape Guide: Pronounce as standalone vowel 'oo'.
Common Learner Trap: Keep vowel quality steady across all 4 tone contours.
Tone
T3 (214)
3rd Tone (Low-Dipping)
Tone Pitch & Cadence: Tone 3 dips low like English disbelief intonation 'Really?' before rising back up.
Sandhi: When followed by another 3rd tone syllable, chǔ changes to a 2nd tone (rising 35).
👂
Listening trap: Do not confuse chǔ with cù or qǔ. The retroflex initial 'ch' requires curling the tongue back, unlike alveolar 'c' or alveolo-palatal 'q'.
👋
Physical Tone Gesture: Trace a checkmark in the air: dip down from mid-level to low, then sweep sharply up to high.

Topology: Left-right · Strokes: 18 strokes

Writing Balance Rule: Keep the left radical (石) compact and narrow, and allot slightly more horizontal width to the right phonetic component (出) so the entire character looks stable and balanced.

Simplification Logic: The traditional form 礎 uses 歺 for the phonetic component on the right, which was simplified to 出 in the modern Chinese character set.

Radical 石 · Stone Radical (stone, rock, cliff)

Semantic Clue (形旁): 石 (indicates that a foundation or plinth is made of stone or rock)

Phonetic Clue (声旁): 出 (original sound: chū)

A stone (石) placed beneath a pillar to prop it out (出) and support the entire structure serves as the foundation (础).

  • 石 stone, denoting material or structural basis
  • 出 provides the approximate pronunciation 'chǔ'
Liushu category: Phono-semantic (形声)

Origin: Originally created as a phono-semantic compound where the stone radical (石) signifies the heavy stone base under wooden pillars in ancient Chinese architecture, paired with the phonetic element 出.

Semantic Evolution: From the physical stone pillar base in ancient buildings, the meaning broadened metaphorically to any abstract foundation, basis, or groundwork.

  • In traditional Chinese architecture, wooden pillars were never planted directly into damp dirt; they rested on stone plinths (礎) to prevent rotting.
🇻🇳
Sino-Vietnamese
sở
The Chinese 3rd tone corresponds roughly to the Vietnamese hỏi tone in certain registers.
🇯🇵
Kanji (Japanese)
On: ソ / Kun: 礎, いしずえ
🇰🇷
Hanja (Korean)
초
Sound Shift Bridge: Shared East Asian cultural and lexical term derived from Middle Chinese /classical roots.
Vivid Mnemonic Story

To build a rock-solid foundation (础), you need a heavy STONE (石) peeking OUT (出) from the ground to hold up your house.

Phonetic Family (形声字家族)
初
chūbeginning, initialUses the clothing/garment radical (衤) + 出, referring to cutting cloth as the beginning of making a garment.
拙
zhuōclumsy, dullUses the hand radical (扌) + 出, implying hands that stick out awkwardly.
Lookalikes & Traps (形近字)
初(chū)
初 has the clothing radical (衤) on the left for beginnings, whereas 础 has the stone radical (石) on the left for foundations.
Active Recall Challenge
我们要为以后的工作打好坚实的[___]。
Clue: jī chǔ
Common Learner Pitfall

Confusing the left radical 石 (stone) with 示 (altar/spirit), leading to miswriting the character as *初* or other radical variants.

Memory Prompts
Recognition: What is the meaning and pronunciation of 础 when seen in the word 基础 (jīchǔ)?
Production: How do you write the character for 'foundation' (chǔ) using the stone radical and the phonetic component?

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