HanziGuru.糹 · sī
糹
sī[si1]Tone 1

silk radical

Guru Deep Dive

English · silk radical

Cached lesson
1 / 1
Topology:Single character
Strokes:3
Writing Balance Rule: When written as a left-hand radical (纟), it is compressed vertically and tucked tightly to the left side to leave room for the right phonetic or semantic component.
Simplification Logic: The traditional complex form 糹 (consisting of 9 strokes representing multiple connected threads) was streamlined into the modern 3-stroke simplified form 纟 for faster, cleaner handwriting.

silk radical (Kangxi radical 120)

threadfiberstextiles
radicalFormalBound morpheme#radicals#textiles#writing components
Sample Usage
  • 红色的红字里有纟旁。
    hóngsè de hóng zì lǐ yǒu sī páng.
    The character for red (红) contains the silk radical.
  • 这个部首与丝织品有关。
    zhège bùshǒu yǔ sīzhīpǐn yǒuguān.
    This radical is related to silk textiles.
/[sɹ̩⁵⁵]/Tone: 55
糹
sīsi1
++
¯(55)
=sī
Build the syllable
Step-by-step blending
si
Tone mark placement: Tone mark sits on "i" per main-vowel priority (a > e > o; in -iu/-ui the mark takes the second vowel).
Initial Consonant
s
Type: Dental Fricative
Sounds like: s sound like in 'snake'
Unaspirated
Airflow Tactile Test: Clear, steady sibilant hiss.
Tongue & Mouth Position: Tip of the tongue is placed very close to the back of the upper teeth, creating a narrow channel for a continuous hissing airflow.
Final Rhyme
i (-i*)
Vowel Group: -a vowel group
Sounds like: syllabic i as in words after s/z/c
Note: Written as 'i (-i*)', pronounced as rounded 'i' [y].
Mouth Shape Guide: Combine initial 'zh-' (jr) with final '-i' (rr/zz).
Common Learner Trap: Do NOT pronounce '-i' as 'ee' after zh-! Keep your tongue in the consonant position and buzz 'rr/zz'.
Tone
T1 (55)
1st Tone (High-Flat)
Tone Pitch & Cadence: Tone 1 stays flat and high, just like singing a high sustained note in a musical scale.
👂
Listening trap: Confusing the retroflex sibilant 'si' with 'shi' because of non-native tongue positioning.
👋
Physical Tone Gesture: A high, flat horizontal chop in the air at eye level, matching the high steady pitch of Tone 1.

Topology: Single character · Strokes: 3 strokes

Writing Balance Rule: When written as a left-hand radical (纟), it is compressed vertically and tucked tightly to the left side to leave room for the right phonetic or semantic component.

Simplification Logic: The traditional complex form 糹 (consisting of 9 strokes representing multiple connected threads) was streamlined into the modern 3-stroke simplified form 纟 for faster, cleaner handwriting.

Radical 纟 · Silk radical (Silk, threads, textiles)

Semantic Clue (形旁): 纟 (Acts as the semantic indicator pointing to concepts of threads, weaving, and cloth.)

Originally a pictograph of twisted silk cocoons and threads, compressed into three neat strokes for modern usage.

  • 纟 Three simplified strokes representing intertwined threads.
Liushu category: Pictogram (象形)

Origin: In Oracle Bone scripts, the character depicted bundles of raw silk threads or cocoons strung together for weaving.

Semantic Evolution: Over millennia, the pictograph evolved into a standardized radical used exclusively on the left side of characters relating to cloth, cord, and color.

  • Silk was one of ancient China's most prized commodities, which explains why dozens of characters related to textile production share this root.
🇯🇵
Kanji (Japanese)
On: シ (shi) / Kun: いと (ito)
Sound Shift Bridge: The pinyin 'sī' echoes the English word 'silk' in its initial sibilant sound.
Vivid Mnemonic Story

Imagine three delicate silk threads (纟) hanging down vertically, shimmering brightly in the high, clear sunshine of Tone 1.

Phonetic Family (形声字家族)
紇
+ 乞 (silk)
Lookalikes & Traps (形近字)
女(nǚ)
The female radical (女) has a slanted crossing stroke, whereas the silk radical (纟) consists of curved hooks and dots ending in a vertical lift.
Active Recall Challenge
漢字“紅”的左邊是[___]旁。
Clue: sī
Common Learner Pitfall

Writing the three strokes of 纟 in the wrong order or forgetting to compress it when combining it as a left radical.

Memory Prompts
Recognition: What does the radical 纟 mean and what is its pinyin?
Production: How do you write the simplified 3-stroke silk radical?

Watch authentic native speakers pronounce and explain this word in real-world YouTube videos.

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糹sīsilk radical
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