What is the origin of the Italian word 'sempre'?
Adverbial etymology back to the Latin word semper is the origin of the Italian word sempre. The respective pronunciations -- of the word for "always" in English translation -- will be "SEM-per" in modern (Church) Latin and "SEM-prey" in modern Italian.
"Always, always!" is an English equivalent of the Italian and Portuguese phrase Sempre, sempre! The adverb serves the same function in both Romance languages. The respective pronunciations nevertheless will differ since Italians pronounce the word as "SEM-prey" and Cariocan Brazilians and continental Portuguese say "SEM-pree."
What is 'Io vi amo per sempre e sempre Io sono sempre qui per voi' when translated from Italian to English?
Always or Ever may serve as English equivalents of 'sempre'. In the sense of 'ever', a synonym of 'sempre' is mai. Both words are adverbs. They're pronounced 'SEHM-pray' and 'meye'.* *The sound 'eye' is the sound in the English noun 'eye'. In fact, the word sounds similar to the form of the first person possessive as 'my' in English.