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This linguistic study analyzes the etymology of 'cisco' in Portuguese and Spanish, suggesting implications for phonological understanding.
The etymon cinisculus > Portuguese cisco ‘charcoal-dust’, suggested by C. Michaëlis de Vasconcellos, 1 is accepted by Körting 2 without comment. Meyer-Lübke 3 properly questions this etymon because of phonological reasons.
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Max A. Luria (1937) studied this question.
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