In Greek mythology, three terrifying snake-haired winged goddesses, named Alecto, Megaera, and Tisiphone, who mercilessly punished wrongdoing, especially when committed within families.

Eumenides meant "the kindly ones". We now use the word "euphemism" to describe words which do not say the unpleasant idea intended.

From Greek euphemismos, "use of a favorable word in place of an inauspicious one"; from euphemizein "to speak with fair words", from eu-, "good" + pheme, "speaking", from phanai, "to speak".

In ancient Greece, the superstitious avoidance of words of ill-omen during religious ceremonies, or substitutions; such as, Eumenides, "the Gracious Ones" with reference to the Furies.

In English, a rhetorical term at first; broader sense of "choosing a less distasteful word or phrase than the one meant" was first established or documented in 1793.