Geas
Mythological taboo or vow
A geis or geas (pl. geasa) is an idiosyncratic taboo, whether of obligation or prohibition, similar to being under a vow or curse, yet the observance of which can also bring power and blessings. It is also used to mean specifically a spell prohibiting some action. Geasa are common in Irish and Scottish folklore and mythology, as well as in modern English-language fantasy fiction. The word originates in Old Irish, also known as Old Gaelic, and retains the same form in Modern Irish (nominative singular geis /ɟɛʃ/, nom. plural geasa /ˈɟasˠə/; genitive sg. geise /ˈɟɛʃə/, gen. pl. geas /ɟasˠ/). https://en.wikipedia.org/wiki/Geas
A geis or geas (pl. geasa) is an idiosyncratic taboo, whether of obligation or prohibition, similar to being under a vow or curse, yet the observance of which can also bring power and blessings. It is also used to mean specifically a spell prohibiting some action. Geasa are common in Irish and Scottish folklore and mythology, as well as in modern English-language fantasy fiction. The word originates in Old Irish, also known as Old Gaelic, and retains the same form in Modern Irish (nominative singular geis /ɟɛʃ/, nom. plural geasa /ˈɟasˠə/; genitive sg. geise /ˈɟɛʃə/, gen. pl. geas /ɟasˠ/).
