More about limn
Limn is not a misspelling of another word. It comes from the late Middle English verb lymne(n) (also limnen, liminen, limpnen, luminen) “to illuminate (a book, manuscript, or rubric),” a shortening of enlumine, from the Old French verb enluminer. Enluminer comes from Latin illūmināre or inlūmināre “to give light to, brighten, illuminate.” The root of the Latin verb is the noun lūmen (inflectional stem lūmin-) “light, radiance, rays of light,” from an unrecorded louksmen. Louksmen is derived from the common Proto-Indo-European root leuk-, louk-, luk– “white, bright,” which is also the source of Latin lūx (stem lūc-) “a light,” lūna “moon (from louksnā, which is also the source of Russian luná “moon”), Greek leukós “white, bright,” amphilýkē “twilight,” and Old English lēoht, līht (English light). Limn entered English in the first half of the 15th century.