The Spanish word 'chavalo' is a diminutive form of 'chavo', meaning 'kid' or 'boy'. It is formed by adding the diminutive suffix '-alo' to the base word 'chavo'. This diminutive form gives the word a more endearing or affectionate connotation, similar to saying 'little boy' or 'young kid'.

A simpler and more common related Spanish word is 'chavo', which is the base word meaning 'kid' or 'boy'. You might also encounter the feminine forms 'chava' (girl) and 'chavala' (little girl). These words are particularly common in Mexican Spanish and some Central American varieties.

There aren't any commonly used English words that are directly etymologically related to 'chavalo' or 'chavo', as these terms developed specifically in Spanish-speaking regions. English speakers might find it helpful to think of it as similar to adding '-y' or '-ie' to make diminutive forms in English (like 'doggy' from 'dog').