The compound adjective 'world-famous' is a relatively modern formation, emerging in the 19th century from the straightforward combination of two established English words. 'World' has Germanic origins, tracing back to Old English 'woruld', which referred to human existence and the physical earth. 'Famous' entered English via Old French from Latin 'famosus', itself derived from 'fama' meaning 'report, reputation, fame'. The compounding logic is transparent and hyperbolic: something or someone is not merely famous within a local or national context, but their renown is so extensive it spans the entire world, serving as a powerful intensifier of the core concept of fame.

Structure: world (the earth) + famous (well-known) - world: From Old English 'woruld', meaning 'human existence, the affairs of life, the earth'. In this compound, it functions as an intensifier meaning 'throughout the globe'. - famous: From Latin 'famosus', meaning 'renowned, celebrated'. It functions as the core adjective describing the state of being widely known.