Etymology

Cwm-y-glo

Today it means: A village in Llanrug community, Gwynedd, Wales (OS grid ref SH5562). Full definition →

Welsh cwm + y + glo
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The story

  1. Welsh · derived fromcwm + y + glo“valley of coal”
  2. English todayCwm-y-glo

From Welsh cwm + y + glo (“valley of coal”).

Etymology from Wiktionary, CC BY-SA 4.0.