The Spanish word 'chiquitito' meaning 'extremely small' has an interesting formation that shows how Spanish can stack diminutive suffixes to intensify meaning. It starts with the Latin word 'ciccum', which referred to the membrane of a pomegranate or something trivial (a trifle). This evolved into the Spanish word 'chico' meaning 'small'.

To create an even smaller meaning, Spanish added the diminutive suffix '-ito' to form 'chiquito' (very small). Then, to express something that is truly tiny, another '-ito' suffix was added to create 'chiquitito' (extremely small). This double diminutive formation is a common feature in Spanish that allows speakers to express varying degrees of smallness or endearment.

The most common related Spanish words are 'chico' (small, boy) and 'chiquito' (very small). These words are used much more frequently than 'chiquitito' and form the base from which 'chiquitito' is derived. 'Chico' is also commonly used as a noun meaning 'boy' or 'kid', while its feminine form 'chica' means 'girl'.

While there aren't any common English words directly related to 'chiquitito' through the Latin 'ciccum', English speakers might recognize the word from Spanish-language contexts, particularly in the famous song 'Chiquitita' by ABBA, where it's used as a term of endearment meaning 'little one'.