To curl hair into small, tight, unruly curls; to cause hair to become fuzzy and stand on end.
Possibly from Dutch or Scandinavian origins related to curling or ruffling; appears in English from the 16th century, with roots in words meaning 'to twist' or 'to ruffle.'
Humidity makes hair frizz because water molecules enter the hair shaft and disrupt its structure—which is why frizz is worse on humid days and impossible to completely prevent without chemicals!
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