(obs.) To curl, crease, or wrinkle.
To gather into or adorn with plaits, as a dress.
Origin of frounce
- From Middle English frouncen, from Old French froncir "to wrinkle, frown", from Frankish *hrunkja "a wrinkle" from Proto-Germanic *hrunkijō, *hrunkitō (“fold, wrinkle”), from Proto-Indo-European *(s)ker- (“to turn, bend”). Akin to Old High German runza "fold, wrinkle, crease" (German Runzel "wrinkle"), Middle Dutch ronse "frown", Old Norse hrukka "wrinkle, crease" (Icelandic hrukka "wrinkle, crease, ruck"). More at ruck2.