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Seal Western Han 202 BC-9 AD 
Seal Shuowen ~100 AD 
Clerical Qin 221-206 BC 
Clerical Western Jin 266-316 AD Regular Modern
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Changed fields: hint, components
Components
Character Evolution
Historical Pronunciations
| Middle Chinese | Old Chinese | Gloss | |
|---|---|---|---|
| Baxter-Sagart | duwH | lˤok-s | hole; drain |
說文解字
《說文》：“竇，空也。从穴，瀆省聲。”
Sources
- Readings & variants
- Unicode
- Historical pronunciations
- Baxter-Sagart
- Historical images
- Academia Sinica
- Etymology
- Shuowen Jiezi (說文解字)