The Spanish word 'cada' meaning 'each' comes from Vulgar Latin 'cata', which in turn derives from Ancient Greek 'κατά' (kata). The Greek word had several meanings including 'according to', 'during', and importantly 'each'. As the word evolved from Greek through Vulgar Latin to Spanish, it simplified both in form and meaning, retaining only the distributive sense of 'each'. The change from 'cata' to 'cada' shows a common sound change where the 't' sound became voiced to 'd' between vowels, a frequent phenomenon in the development of Spanish from Latin.

'Cada' is a fundamental Spanish word and appears in many common compound expressions like 'cada uno' (each one), 'cada vez' (each time), and 'cada día' (each day). While it's a basic word itself, it helps form these essential everyday Spanish phrases.

While English doesn't have any common words directly related to 'cada', we do use some technical terms that come from the same Greek root 'kata-'. For example, 'catalog' (originally meaning 'according to the list'), 'category' (meaning a way of classifying things according to some principle), and 'catastrophe' (literally 'down-turning'). These words all contain the Greek prefix 'kata-', though their meanings have evolved quite differently from the Spanish 'cada'.