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Proto-Indo-European *gley-

English clay (derived)
English climb (derived)
English clad (mention)
English cleat (mention)
English clothe (derived)
Afrikaans klei (derived)
Old English clæg (derived)
Bulgarian клей (derived)
Danish kline (derived)
German klettern (mention)
German Klette (mention)
German Kleie (mention)
Middle English clothen (derived)
Old High German kleini (derived)
Ancient Greek γλία (derived)
Ancient Greek γλίνη (derived)
Ancient Greek γλοιός (derived)
Ancient Greek γλίσχρος (derived)
Latin glis (derived)
Latin glutus (derived)
Latin glarea (mention)
Latvian glīts (mention)
Norwegian Bokmål kline (derived)
Dutch klei (derived)
Polish klej (mention)
Polish glon (derived)
Russian клей (derived)
Yiddish קליי (derived)