A Welsh word meaning a valley, particularly a narrow wooded valley, used in place names throughout Wales.
From Welsh 'glyn' or 'glynn,' likely related to Old Celtic words for hollow or depression. The term has been used for centuries in Welsh geography and appears in many Welsh place names.
If you see a place name with 'glyn' in Wales like Glyndŵr or Glynneath, you're literally reading the landscape—medieval maps would have just called them valleys, but Welsh place names actually encode information about the terrain.
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