Sometimes a term may begin as a pejorative word and eventually be adopted in a non-pejorative sense. Big Bang, Quaker, Yankee, Okie, Tory and Whig, Ham radio, Methodist, Shaker, Unitarian, Sooner, and Liberal were originally slang insults but came to be used as non-pejorative standard words. In historical linguistics, this phenomenon is known as melioration, or amelioration, or semantic change. Sometimes a term is still considered as a pejorative word by some but not by others. In other cases, some groups have attempted to "reclaim" formerly offensive words applied against them (reclaimed word).