olive: [13] The word olive probably originated in a pre-Indo-European language of the Mediterranean area. Greek took it over as elaíā, and passed it on to English via Latin olīva and Old French olive. The olive’s chief economic role is as a source of oil (indeed the very word oil comes from a Greek derivative of elaíā), and before the word olive arrived in English, it was called eleberge, literally ‘oil-berry’. => oil
