glimmer (v.) Look up glimmer at Dictionary.com
early 14c., "shine brightly," a frequentative from Proto-Germanic *glim-, root of Old English glæm "brightness" (see gleam (n.)). Sense shifted 15c. to "shine faintly." Compare Dutch glimmeren, German glimmeren "to shine dimly." Related: Glimmered; glimmering.
glimmer (n.) Look up glimmer at Dictionary.com
1580s, from glimmer (v.).