Language & WorldMental model
Why every polite word eventually turns rude.
Steven Pinker called it the euphemism treadmill in 1994: a new, mild word gradually absorbs the flavour of the thing it softens and has to be replaced again. "Toilet" was an 18th-century euphemism for "house-of-office", which had itself replaced "privy"; bathroom, washroom and restroom followed. The same chain runs through terms for disability and ethnicity.
Useful: The stigma sits in the attitude, not the word; a new word alone doesn't change it.
Source: en.wikipedia.org