See also: efn, and ef'n Old English Alternative forms efen-, emn-, em-, efne- Etymology From the adjective efn, descended from Proto-Germanic *ebnaz. Pronunciation IPA(key): /efn/, [evn] Prefix efn- denoting equality: equal, equally efn- + eald (“old”) → efneald (“of the same age”) efn- + gōd (“good”) → efngōd (“just as good”) efn- + niht (“night”) → efnniht (“equinox”) efn- + heorte (“heart”) → efnheorte (“harmony, concord”) denoting togetherness: co-, fellow- efn- + cempa (“soldier”) → efncempa (“fellow soldier”) efn- + þrōwian (“to suffer”) → efnþrōwian (“to sympathize”) efn- + wyrċan (“to work”) → efnwyrċan (“to work together, cooperate”) efn- + wyrhta (“worker”) → efnwyrhta (“co-worker”) Derived terms Old English terms prefixed with efn- Descendants Middle English: even-, euen- English: even-Wikiwand - on Seamless Wikipedia browsing. On steroids.