Learn how to say Epistles correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word epistle:
formal or humorous
activists firing off angry epistles
a poem or other literary work in the form of a letter or series of letters.
(Epistle) a book of the New Testament in the form of a letter from an Apostle:
St Paul’s Epistle to the Romans
an extract from an Epistle (or another New Testament book not a Gospel) that is read in a church service.
Old English, via Latin from Greek epistolē, from epistellein ‘send news’, from epi ‘upon, in addition’ + stellein ‘send’. The word was reintroduced in Middle English from Old French