The compound adjective 'world-changing' is a modern English formation that transparently combines two established elements. The first, 'world', originates from the Old English 'woruld', which carried a sense of human life and affairs, later expanding to denote the planet and all of human civilization. The second element, 'changing', is the present participle of 'change', a verb with a journey from Latin 'cambiare' (to exchange) through Old French into English, acquiring the broader sense of transformation. The logic of the compound is direct and literal: it describes something with the capacity to alter the fundamental state or course of the world itself, shifting from the ancient concept of a transactional exchange to a modern sense of global-scale transformation.

Structure: world (the earth) + changing (making different) - world: From Old English 'woruld' (age of man, human existence, the earth), functioning as a noun root specifying the scope or domain. - changing: From the verb 'change', derived from Old French 'changier', ultimately from Latin 'cambiare' (to barter, exchange), functioning as a participial adjective meaning "making or causing to become different".