Euphemistic & Dysphemistic Language

Euphemistic as what is says in the Reading book for CL, a milder or more positive expression used to replace a negative or unpleasant. it means that, we change a particular word to be more pleasant to the human ear.  for example we change the word "stupid" to "mentally challenge" or "fat" to "overweight"  

Dysphemistic; replacing a neutral or positive expression with a negative unpleasant one. it is the opposite of Euphemistic. Change a particular harsh word to a very irritating one. For example you change the "black people" to "negro" or "prostitute" to "whore" or "bitch".