extra-
prefix
- outside
Wiktionary
prefix
Etymology: Etymology tree Proto-Indo-European *h₁éǵʰ Proto-Indo-European *-s Proto-Indo-European *h₁éǵʰs Proto-Indo-European *-teros Proto-Indo-European *h₁eǵʰsteros Proto-Italic *eksteros Latin exter Latin extrā English extra- From Latin extra (“outside, except, beyond”, adverb and preposition), from exter (“being on the outside”).
- Outside of, beyond.
“extramarital: outside of marriage”