noun, noun or participle which takes 'suru', transitive verb, intransitive verb
A somewhat literary or formal word for deep joy or delight. Often used in written language or elevated speech. Can be used as a noun or with する to mean 'to rejoice' or 'to be delighted'.
彼の顔には喜悦の色が浮かんでいた。
A look of joy appeared on his face.
朗報に接し、一同は大いに喜悦した。
Upon hearing the good news, everyone was greatly delighted.