The Collaborative International Dictionary
Frouncing
Frounce \Frounce\, v. i. [imp. & p. p. Frounced; p. pr. & vb. n. Frouncing.] [OE. frouncen, fronsen, to told, wrinkle, OF. froncier, F. froncer, perh. fr. an assumed LL. frontiare to wrinkle the forehead, L. frons forehead. See Front, and cf. Flounce part of a dress.] To gather into or adorn with plaits, as a dress; to form wrinkles in or upon; to curl or frizzle, as the hair.
Not tricked and frounced, as she was wont.
--Milton.
Wiktionary
frouncing
vb. (present participle of frounce English)