Meaning

noun a crowd especially of ordinary or undistinguished persons or things

noun an irregular fold in an otherwise even surface (as in cloth)

verb become wrinkled or drawn together

origin1780, from Old Norse hrukka (“wrinkle, crease”), from Proto-Germanic *hrunkijō, *hrunkitō (“fold, wrinkle”), from Proto-Indo-European *(s)ker- (“to turn, bend”). Akin to Icelandic hrukka (“wrinkle, crease, ruck”), Old High German runza (“fold, wrinkle, crease”), German Runzel (“wrinkle”), Middle Dutch ronse (“frown”). More at frounce. Possibly related to Irish roc.

Etymology from Wiktionary, CC BY-SA 3.0