Purism

Pur"ism (?), n. [Cf. F. purisme.] Rigid purity; the quality of being affectedly pure or nice, especially in the choice of language; over-solicitude as to purity. "His political purism." De Quincey.

The English language, however, . . . had even already become too thoroughly and essentially a mixed tongue for his doctrine of purism to be admitted to the letter.