Observation shows that it is much more common for word meanings to change in denotation from ______ to pejorative than it is for them to go the other way.
Words of language can be classified into semantically related sets or ______.
In terms of the origin of words, words may fall into native words and ______ words.
The associated transfer of meaning and euphemistic use of words are often due to ______ factors.
A. scientific
B. internal
C. historical
D. psychological