The Spanish word 'mail' (meaning 'email, electronic mail') comes from English 'mail', which can be traced back to Old French 'male' meaning 'leather bag'. This in turn derives from Old High German 'malaha' meaning 'bag, sack'. The semantic evolution is quite interesting - from a physical bag or sack used to carry items, to specifically referring to letters and postal materials carried in such bags, and finally to electronic messages in the modern digital age.

The Spanish word 'mail' is a relatively recent borrowing from English, and there aren't many other common Spanish words that share its etymology. Spanish traditionally uses 'correo' for physical mail and 'correo electrónico' for email, though 'mail' has become common in informal usage, especially in technological contexts.

The English word 'mail' is obviously related, and understanding its evolution can help remember the Spanish term. While English 'mail' can refer to both physical postal items and electronic messages, Spanish 'mail' is primarily used for electronic communication. The English word 'mailbag' preserves a more direct connection to the original meaning of a physical bag for carrying letters and packages.