Etymology

geas

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Today it means: A (generally magical) vow, obligation or injunction placed upon someone to do or not do something, which typically brings harm if violated and blessings if obeyed. Full definition →

Irish geis
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The story

  1. Irish · borrowed fromgeis“injunction; taboo, prohibition, spell”
  2. English todaygeas

Borrowed, like English geis, from Irish geis (“injunction; taboo, prohibition, spell”). The pronunciation resembles Irish geis, though the spelling matches its synonymous but heterophonous alternative form geas.

Words from the same roots

Irishgeis all →

geis

Etymology from Wiktionary, CC BY-SA 4.0.