'Frequently, over time, euphemisms themselves become taboo words, through the linguistic process of semantic change known as pejoration, which University of Ore

'Frequently, over time, euphemisms themselves become taboo words, through the linguistic process of semantic change known as pejoration, which University of Oregon linguist Sharon Henderson Taylor dubbed the "euphemism cycle" in 1974, also frequently referred to as the "euphemism treadmill"' https://en.wikipedia.org/wiki/Euphemism https://en.wikipedia.org/wiki/Euphemism