The Spanish word 'inquilino' (meaning 'tenant') comes from the Latin word 'inquilinus', which meant 'tenant' or 'lodger'. The Latin term was formed by combining two elements: the prefix 'in-' meaning 'in' or 'within', and the verb 'colere' meaning 'to inhabit' or 'cultivate'. So literally, an 'inquilinus' was someone who dwells or lives within a place.

Some related Spanish words that share the Latin root 'colere' include 'cultivar' (to cultivate), 'cultura' (culture), and 'colonia' (colony). All these words relate to the idea of inhabiting, tending to, or developing a place.

English speakers might recognize the connection to words derived from the same Latin root 'colere', such as 'colony', 'cultivate', and 'culture'. The 'in-' prefix is also familiar in English words like 'inside' or 'indoor'. While English doesn't have a direct cognate of 'inquilino', understanding these related words can help remember its meaning of someone who dwells within a place.