Euphemism
A euphemism is a generally innocuous word or expression used in place of one that may be found offensive or suggest something unpleasant. Some euphemisms are intended to amuse; while others use bland, inoffensive terms for things the user wishes to downplay. Euphemisms are used to refer to taboo topics (such as disability, sex, excretion, and death) in a polite way, or to mask profanity.
There are three antonyms of euphemism: dysphemism, cacophemism, and loaded language. Dysphemism can be either offensive or merely ironic; cacophemism is deliberately offensive. Loaded language evokes a visceral response beyond the meaning of the words.
Etymology
Euphemism comes from the Greek word εὐφημία (euphemia), meaning "the use of words of good omen", which in turn is derived from the Greek root-words eû (εὖ), "good, well" and phḗmē (φήμη) "prophetic speech; rumour, talk". Etymologically, the eupheme is the opposite of the blaspheme "evil-speaking." The term euphemism itself was used as a euphemism by the ancient Greeks, meaning "to keep a holy silence" (speaking well by not speaking at all).