Where does “extra-Quranic” come from?
extra-Quranic (English) comes from English extra, from English extraordinary, from Latin extraordinārius, from Latin ōrdinem, from Middle Low German orden, from Latin ōrdināre, from Latin ōrdō, from Proto-Italic ored(h)- — to arrange.
extra-Quranic (English): Outside the Quran
Ancestry of “extra-Quranic”, step by step