The Spanish word 'amorcito' is a diminutive form of 'amor' (love), created by adding the diminutive suffix '-cito' to the base word. The base word 'amor' comes directly from Latin 'amor', which also meant 'love'. The diminutive suffix '-cito' adds a sense of endearment and smallness, making 'amorcito' mean 'little love' or 'dear love' - it's often used as a term of endearment in Spanish.

The most obvious related Spanish word is 'amor' (love), which is the base word from which 'amorcito' is derived. Other common Spanish words from the same root include 'amoroso' (loving), 'enamorar' (to fall in love), and 'enamorado' (in love). These all share the fundamental concept of love and affection.

While English 'love' is not etymologically related to 'amorcito', there are several English words that come from the same Latin root 'amor'. These include 'amorous' (showing romantic love), 'enamored' (in love with), and 'paramour' (a lover, from French 'par amour' meaning 'through love'). The word 'amateur' also comes from this root, originally meaning someone who does something for the love of it rather than professionally.