Webster’s Revised Unabridged Dictionary · 1913
Demephitize
De·meph′i·tize (dē·mĕf′ĭ·tīz), v. t. [imp. & p. p. Demephitized; p. pr. & vb. n. Demephitizing.] [Cf. F. méphitiser to infect with mephitis.] To purify from mephitic or foul air. — De·meph′i·ti·za′tion, n.