/ ˈpjʊərɪst; NAmE ˈpjʊr-/ noun
a person who thinks things should be done in the traditional way and who has strong opinions on what is correct in language, art, etc.
► pur·ism / ˈpjʊərɪzəm; NAmE ˈpjʊr-/ noun [ U ]
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WORD ORIGIN
early 18th cent.: from French puriste , from pur pure.