HanziGuru.閘 · zhá
閘
zhá[zha2]Tone 2

sluice, gate, brake, electric switch

HSK 7
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闸
Guru Deep Dive

English · sluice, gate, brake, electric switch

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Topology:Left-right
Strokes:8
Writing Balance Rule: The left radical (门) should be narrower and slightly taller, while the right component (甲) occupies the main weight on the right, keeping a stable vertical axis.
Simplification Logic: The traditional form 閘 uses 門 (gate) as the semantic enclosure, which remains identical in simplified Chinese 闸.
1. Meaning

sluice or sluice gate for controlling water flow

to dam up watermechanical brake (colloquial)electric switch or circuit breaker (colloquial)
Noun / VerbNeutral#water control#engineering#machinery#electricity
Sample Usage
  • 水库正在开闸放水。
    shuǐkù zhèngzài kāizhá fàngshuǐ.
    The reservoir is currently opening its floodgates to discharge water.
  • 骑车时要捏住闸。
    qíchē shí yào niēzhù zhá.
    You must squeeze the brake when riding a bicycle.
2. Sound
/[ʈʂä³⁵]/Tone: 35
閘
zházha2
++
´(35)
=zhá
Build the syllable
Step-by-step blending
zha
Tone mark placement: Tone mark sits on "a" per main-vowel priority (a > e > o; in -iu/-ui the mark takes the second vowel).
Initial Consonant
zh
Type: Unaspirated Retroflex
Sounds like: j/dr retroflex sound
UnaspiratedRetroflex
Airflow Tactile Test: No burst of air. Tongue curled up. Tissue stays still.
Tongue & Mouth Position: Tongue tip curled back near hard palate
Final Rhyme
a
Vowel Group: -a vowel group
Sounds like: ah sound as in 'father'
Mouth Shape Guide: Pronounce as standalone vowel 'ah'.
Common Learner Trap: Keep vowel quality steady across all 4 tone contours.
Tone
T2 (35)
2nd Tone (Mid-Rising)
Tone Pitch & Cadence: Tone 2 starts mid and rises sharply to the top, exactly like asking 'What?' in English with surprise.
👂
Listening trap: Confusing the retroflex initial 'zh-' with the alveolar initial 'z-' or dental 'j-', leading to mispronunciations like *zá or *jiá.
👋
Physical Tone Gesture: A quick upward head nod or upward hand sweep matching the rising 35 pitch contour.
3. Writing

Topology: Left-right · Strokes: 8 strokes

Writing Balance Rule: The left radical (门) should be narrower and slightly taller, while the right component (甲) occupies the main weight on the right, keeping a stable vertical axis.

Simplification Logic: The traditional form 閘 uses 門 (gate) as the semantic enclosure, which remains identical in simplified Chinese 闸.

4. Components

Radical 门 · Enclosure / Gate Radical (door, gate, opening)

Semantic Clue (形旁): 门 (Indicates a gateway, barrier, or structure controlling passage)

Phonetic Clue (声旁): 甲 (original sound: jiǎ)

A gate or barrier (门) combined with a shell or armor plate structure (甲) that blocks or regulates passage, creating a heavy-duty water sluice or mechanical brake.

  • 门 Gate / Door (Semantic clue for barriers and openings)
  • 甲 Armor / Shell (Phonetic and structural clue)
5. History
Liushu category: Phono-semantic (形声)

Origin: Combined from the enclosure/gate radical (门) representing a barrier structure and (甲) providing the sound and the sense of a protective shield or plate.

Semantic Evolution: Originally referred specifically to water floodgates; extended over time to mean any mechanical gate, water damming, brakes, and modern electrical switches.

  • Water management has been critical in Chinese history, making sluice gate terminology ancient and precise.
6. Sinosphere
🇻🇳
Sino-Vietnamese
trát
The entering tone in Sino-Vietnamese corresponds well with checked stop consonants, matching the sharp stop of 闸.
🇯🇵
Kanji (Japanese)
On: サツ (satsu)
🇰🇷
Hanja (Korean)
팝
Sound Shift Bridge: Mandarin retroflex initial 'zh-' frequently bridges to 't-' or 'ch-' in historical borrowings.
7. Memory
Vivid Mnemonic Story

Imagine a giant metal gate (门) reinforced with hard turtle armor plating (甲) acting as a heavy sluice gate to hold back a roaring river.

Phonetic Family (形声字家族)
甲
jiǎfirst of the ten Heavenly Stems, armor, shell, or grade APhonetic Core (声旁)
押
yāto mortgage, to pawn, to detain+ 扌 (hand)
鸭
yāduck+ 鸟 (bird)
闸
zháold variant of 閘|闸[zha2]; sluice+ 门 (door)
Explore this family →
Lookalikes & Traps (形近字)
压(yā)
压 means 'to press down' and lacks the gate enclosure (门) completely.
8. Mastery
Active Recall Challenge
水庫的[___]打開了，下遊開始漲水。
Clue: zhá
Common Learner Pitfall

Mistaking the phonetic component 甲 for another radical or confusing the tone with Tone 4 (zhà).

Memory Prompts
Recognition: What does 闸 mean when paired with 水 (水闸)?
Production: How do you write the character for 'sluice gate / brake' (zhá)?
Real-World Video Context

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

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