The number two shows the DW→D simplification. PIE *dwóh₁ had an initial cluster 'dw-' which simplified to 'd' in Kurdish/Persian/Hindi, remained as 'dv' in Russian, became 'tw' in English, and 'd' in French (from Latin 'duo').
du / dû *dwóh₁
| Kurdish | Persian | Hindi | Russian | French | English |
|---|---|---|---|---|---|
| du / dû | do | do | dva | deux | two |
Explanation
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Status: Verified
Last Updated:
January 11, 2026
Notes:
Universal IE numeral