The word "Tanzanian" is a modern demonym formed directly from the name of the nation, Tanzania. Tanzania's name is a 20th-century political creation, a blend of "Tanganyika" (the mainland territory) and "Zanzibar" (the island archipelago), which united in 1964. The suffix "-an", originating from the Latin adjectival suffix "-anus", is a productive English morpheme used to form adjectives and nouns denoting origin or association. Therefore, "Tanzanian" logically denotes anything or anyone pertaining to this specific geopolitical entity, following a standard pattern for forming nationality terms in English (e.g., Canadian, Brazilian).

Structure: tanzani (Tanzania) + an (relating to) - tanzani: A toponym derived from the country name "Tanzania", itself a portmanteau of "Tanganyika" and "Zanzibar". - an: A suffix of Latin origin via French, used to form adjectives and nouns meaning "belonging to" or "relating to" a place or person.