The Spanish word 'bata' meaning 'robe' or 'gown' has an interesting connection to Tagalog, a language of the Philippines. It appears to be related to the Tagalog word 'bata' meaning 'child'. This linguistic connection likely emerged during the long period of Spanish colonial presence in the Philippines, though the exact semantic development from 'child' to 'robe/gown' is not entirely clear.

While 'bata' is itself a relatively simple and common Spanish word, it doesn't have many obvious etymologically related words in modern Spanish that would be simpler for learners.

There aren't any commonly used English words that are etymologically related to 'bata'. However, English speakers might find it helpful to remember that a 'bata' is similar to a bathrobe in function, though this is just a coincidental similarity in sound rather than a true etymological connection.