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5Signification: estricto
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6Signification: pétreo
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8Signification: encarnizado
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10Signification: sólido
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17Signification: alabastrino
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18Signification: arduo
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19Signification: frío
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20Signification: invulnerable
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21Signification: cruel
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22Signification: descortés
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23Signification: implacable
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24Signification: inalterable
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29Signification: sereno
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30Signification: fibroso
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32Signification: avezado
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33Signification: terco
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34Signification: inflexible
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35Signification: firme
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37Signification: laborioso
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39Signification: realistaduro descarnado crudo
Other notation for duro
- duró
- dúro
- durro
- uro
- dur