Etymology

Efail Isaf

Today it means: A village in Llantwit Fardre community, Rhondda Cynon Taf borough county borough, Wales (OS grid ref ST0884). Full definition →

Welsh efail + isaf
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The story

  1. Welsh · derived fromefail + isaf“lower forge”
  2. English todayEfail Isaf

From Welsh efail + isaf (“lower forge”).

Etymology from Wiktionary, CC BY-SA 4.0.