köken: From Middle High German kelte, from Old High German kaltī, from Proto-West Germanic *kaldī. Analysable as kalt + -e. Cognate with Dutch kou, koude, an alteration of Middle Dutch kelde (similarly perhaps English cold).
köken: From Middle High German kelde, from Old High German chaldī, *kaldī, northern variant of chaltī, from Proto-West Germanic *kaldī. The expected Luxembourgish form is *Käll (which is attested in neighbouring dialects of Central Franconian). The alveolar stop was probably preserved (or added) due to analogy with nouns derived with the suffix Proto-Germanic *-iþō, such as Stëllt from stëll. Hence,…