por los siglos de los siglos

== Spanish == === Etymology === Literally, “through the ages of ages" or "over the centuries of centuries”. === Adverb === por los siglos de los siglos (idiomatic) eternally; forever and ever === Further reading === “en, o por, los siglos de los siglos”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025