The first word in John's "Revelation" is a Greek word 'apokalipsis'. Yet, in modern times the word 'apocalypse' and its equivalents in many languages means 'catastrophe', 'tragedy', etc.
So we can assume that the Greek word is pronounced very much the same as the Greek original but has acquired a different maning. What is more, 'apocalypse' is often used instead of 'revelation', e.g. the Apocalypse of St. John. My question: is there a technical term in semantics to name such a dramatic change of meaning of a loan word.