To flicker or shimmer faintly; to move or flutter in a wavering manner.
Possibly related to 'flicker' or 'shimmer,' with roots in Old English. The exact origin is uncertain, but the '-er' ending suggests an iterative verb (one showing repeated action).
Words like 'flimmer,' 'flicker,' and 'flutter' all start with 'fl-' and describe light, delicate movements—linguists call this 'phonaesthesia,' where the sound itself conveys meaning.
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