gàirdeachas

rejoicing, Irish gáirdeachas, Middle Irish gáirdechad, delighting; from gáir, laugh. K.Meyer regards this as from older *gartiugud, shortening or whiling time, from goirid, Early Irish urgartiugud, while time, amuse; with a leaning on gàir, laugh. Cf. Welsh difyru, amuse, divert, from byr, short.