in 18c. slang, "a light, candle, lantern" (1700); in 19c. slang "an eye" (1820), probably a back-formation from glimmer (n.) or in some cases glimpse (n.). Related: Glims.
glen
*gleubh-
glib
glide
glider
glim
glimmer
glimpse
glint
glioma
glissade