Writing Balance Rule: The left side (酉) is slightly narrower and taller, while the right side (夋) provides the broader footing. Ensure proper clearance between components so the character does not look cramped.
1. Meaning
sour, tart
aching or sore (from physical exertion or fatigue)sick at heart, grieved, or enviouspedantic, impractical, or bookishchemical acid
Tongue & Mouth Position: Tip of the tongue rests gently near the back of the lower front teeth, allowing air to hiss softly over the blade.
Final Rhyme
uan
Vowel Group: -a vowel group
Sounds like: -uan rhymes with 'wan' in 'swan'
Mouth Shape Guide: Pronounce as standalone vowel 'wahn'.
Common Learner Trap: Keep vowel quality steady across all 4 tone contours.
Tone
T1 (55)
5 → 5 (55)
1st Tone (High-Flat)
Tone Pitch & Cadence: Tone 1 is high and level, matching the pitch of a singer holding a sustained high note.
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Listening trap: Do not confuse 'suān' with 'suǎn' or 'suàn' (which have different tones and meanings). Also ensure the initial 's' is distinct from the retroflex 'sh'.
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Physical Tone Gesture: Tone 1 is a high, steady flat line, like holding a high musical note without any dipping or rising.
3. Writing
Topology: Left-right · Strokes: 14 strokes
Writing Balance Rule: The left side (酉) is slightly narrower and taller, while the right side (夋) provides the broader footing. Ensure proper clearance between components so the character does not look cramped.
4. Components
Radical酉 · Wine Jar Radical (wine jar, fermentation)
Semantic Clue (形旁):酉 (Indicates fermentation, spoilage, or chemical changes that create sourness.)
Phonetic Clue (声旁):夋 (original sound: jun / suan phonetic clue)
A wine jar (酉) that has fermented too long turns sour (酸), supervised by a person walking slowly or lingering (夋).
酉 Wine jar / fermentation radical representing taste and chemical change
夋 Phonetic and structural component on the right
5. History
Liushu category: Phono-semantic (形声)
Origin: Combined from 酉 (wine jar representing fermented liquids) and 夋 (providing the sound and a sense of standing or changing), originally depicting the sharp, tart taste of spoiled wine or vinegar.
Semantic Evolution: Originally referred specifically to the sour taste of fermented wine or vinegar, later expanded to describe physical muscle soreness, emotional grief or jealousy, and chemical acids.
In traditional Chinese medicine and philosophy, sourness is one of the five basic flavors associated with the Wood element and the liver.
6. Sinosphere
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Sino-Vietnamese
toan
Mandarin Tone 1 corresponds roughly to ngang tone in Vietnamese.
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Kanji (Japanese)
On: サン (san) / Kun: す.い (su.i), す.っぱい (su.ppai)
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Hanja (Korean)
산
Sound Shift Bridge: The Sino-Xenic readings ('toan', 'san') preserve the ancient Chinese initial 's-' and nasal ending rhyme.
7. Memory
Vivid Mnemonic Story
You bite into a fermented wine jar (酉) while walking slowly (夋), and your face instantly puckers up because it is overwhelmingly sour (suān).
Phonetic Family (形声字家族)
酸
suānsourBase character with wine jar radical.
梭
suōshuttle (weaving)Replaces wine jar with wood radical (木) for a weaving shuttle.
唆
suōinstigate, egg onReplaces wine jar with mouth radical (口) for speaking/instigating.
Lookalikes & Traps (形近字)
骏(jùn)
Uses the horse radical (马) instead of the wine jar radical (酉), meaning fine horse.
8. Mastery
Active Recall Challenge
这个柠檬太[___]了，我吃不下。
Clue: suān
Common Learner Pitfall
Confusing the right-side component 夋 with other similar components like 俊 or 骏, leading to incorrect radical usage.
Memory Prompts
Recognition: What does 酸 mean when describing legs after a heavy workout?
Production: How do you write the character for 'sour' (suān) in Mandarin?
Real-World Video Context
Watch authentic native speakers pronounce and explain this word in real-world YouTube videos.
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酸suānsour
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