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Lewis’s Elementary Latin Dictionary
1890 American Book Company edition; pinned Perseus XML digitization
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Latin · Etymology 1
From Proto-Italic * plānos , from Proto-Indo-European * pl̥h₂-nó-s ( “ flattened ” ) or * pleh₂-no-s , from * pleh₂- ( “ flat ” ) . Between * pl̥h₂-nó-s or * pleh₂-no-s , the former option is preferable as it contains the expected ablaut grade and is fully phonologically regular. However, there are comparable Baltic forms—such as Lithuanian plónas ( “ thin, slender ” ) —that seemingly show a different ablaut-grade, though these have inner-Baltic explanations.
Further related to Latin palma , planta , plautus , palam , palātum , and likely pellō .
Latin · Etymology 2
From Ancient Greek πλάνος ( plános ) , itself from πλᾰνάω ( plănáō , “ to wander ” ) .
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