The word "tourism" is a relatively modern formation, entering English in the early 19th century. It is built upon the older word "tour," which came into English from French and ultimately from the Latin 'tornus' (a lathe or circle), conveying the idea of a circular journey or a round trip. The suffix "-ism," of Greek origin via Latin, was added to denote the organized activity, practice, or commercial system associated with such journeys. Thus, the literal logic of "the practice of taking tours" evolved into the modern abstract concept of a global industry centered on leisure travel.

Structure: tour (a journey) + ism (act or practice) tour: From Old French 'tour', meaning "a turn, a round, a circuit," from Latin 'tornus', meaning "lathe, a turn." In this word, it functions as the core root denoting the concept of a journey or circuit. ism: From Greek '-ismos', a suffix forming nouns of action or practice. In this word, it functions as a nominalizing suffix meaning "the act, practice, or business of."