Where does “fool's cap” come from?

fool's cap (English) comes from English fool, from French fouler, from Middle French fouller, from Old French foler, from Medieval Latin fullo, from Latin fullo, from Proto-Indo-European bʰleh₃-, from Proto-Indo-European bʰel-.

fool's cap (English): A cap, usually brightly coloured with bells and...

Definitions

  1. A cap, usually brightly coloured with bells and...

Ancestry of “fool's cap”, step by step

fool's cap traces back through two separate lines of ancestry.

via English fool

StepLanguageWordMeaning
1EnglishfoolA person with poor judgment or little...
2Frenchfoulerto stamp, impress, dent; to mill; to walk on,...
3Middle Frenchfoullerto mistreat
4Old Frenchfolerto destroy; to mistreat
5Medieval Latinfullofuller
6Latinfullofuller
7Proto-Indo-Europeanbʰleh₃-bloom, flower
8Proto-Indo-Europeanbʰel-to sound; to speak, roar, bark; shiny, white; to...
9Proto-Indo-Europeanbʰōl-

via English Cap

StepLanguageWordMeaning
1EnglishCapA nickname for the captain of a team, ship, etc
2EnglishCapricornSomeone with a Capricorn star sign
3FrenchCapricorneCapricorn
4LatinCapricornusCapricornus, the constellation of the zodiac
5Latincapera male goat, billy goat; vocative singular of...
6Proto-Italic*kaproshe-goat
7Proto-Indo-Europeankáproshe-goat, billy goat
Every word from Proto-Indo-European bʰōl-Every word from Proto-Indo-European bʰel-Every word from Proto-Indo-European bʰleh₃-