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even-

pre. 1 (context rare dialectal or no longer productive English) Prefix occurring mostly in older terms, bearing the meaning of ''equal-'', ''co-'', ''fellow-'', ''joint-''. 2 Prefix used chiefly in parasynthetic derivatives with the sense of ''even''. 3 Prefix meaning equally, similarly, same. 4 Prefix meaning evenly, straight, direct, according to.