κάτω

Lemma: κάτω

Translation: lower; bottom; down (adverb)

Etymology: From Ancient Greek κάτω (kátō), derived from the preposition κατά (katá) meaning 'down from, against'. This word has been used to indicate downward direction or lower position since ancient times. The concept of 'down' is fundamental across languages, and while not directly cognate with English 'down', both serve similar spatial functions in their respective languages.