I. adjective suffix
Etymology: Middle English, from Old English; akin to Old High German -īn made of, Latin -īnus of or belonging to, Greek -inos made of, of or belonging to
made of ; consisting of <earthen> <leathern> II. verb suffix Etymology: Middle English -nen, from Old English -nian; akin to Old High German -inōn -en 1. a. cause to be <sharpen> b. cause to have <lengthen> 2. a. come to be <steepen> b. come to have <lengthen>
New Collegiate Dictionary. 2001.