The Spanish word 'eneldo' (meaning 'dill') has an interesting journey from ancient Greek through Latin. It began with the Greek word 'ἄνηθον' (anethon), which meant 'dill plant'. This word was borrowed into Latin as 'anethum', keeping the same meaning. Later in Latin, a diminutive form 'anethulus' was created, meaning 'small dill plant'. This evolved into Old Spanish as 'aneldo', and finally became modern Spanish 'eneldo' through a common vowel change from 'a' to 'e' at the beginning of the word.

There aren't many common Spanish words directly related to 'eneldo', as it has remained fairly specific to naming this particular herb throughout its history.

The English word 'dill' is not directly related to 'eneldo', as it comes from a different Germanic root. However, English has borrowed the scientific name 'anethum' for the genus of the dill plant (Anethum graveolens), which shows the same Greek-Latin origin as the Spanish word 'eneldo'.