The Spanish word 'bebito' meaning 'little baby' is formed from two parts: 'bebé' (meaning 'baby') and the diminutive suffix '-ito'. The word 'bebé' itself comes from French 'bébé', also meaning 'baby'. The addition of '-ito' makes the word more endearing and emphasizes the smallness or cuteness of the baby.

A simpler and more common related Spanish word is 'bebé' (baby). While 'bebé' refers to a baby in general, 'bebito' adds the diminutive suffix '-ito' to create a more affectionate term meaning 'little baby'. The suffix '-ito' is very common in Spanish and is used to make words diminutive or more endearing.

While not directly related etymologically, English speakers might recognize the similarity to the word 'baby'. However, the Spanish 'bebé' and 'bebito' actually come from French 'bébé'. Interestingly, both English 'baby' and French 'bébé' are considered to be imitative of infant babbling sounds, though they developed independently.