Where does “madcap” come from?

madcap (English) comes from English Cap, from English Capricorn, from French Capricorne, from Latin Capricornus, from Latin caper, from Proto-Italic *kapros, from Proto-Indo-European kápros — he-goat, billy goat.

madcap (English): impulsive, hasty or reckless; capricious; An...

Definitions

  1. impulsive, hasty or reckless; capricious; An...

Ancestry of “madcap”, step by step

madcap traces back through two separate lines of ancestry.

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

via English MAD

StepLanguageWordMeaning
1EnglishMADInitialism of mutually assured destruction;...
2Middle EnglishmadMad, insane, deranged; not of sound mind;...
3Old Englishġemǣd
4Proto-Germanicmaidijanąto exchange, change
5Proto-Germanicmaidazhurt, wounded; mad, foolish; angry, enraged
6Proto-Indo-Europeanmēy-soft, tender, dear

Words derived from “madcap

Every word from Proto-Indo-European kápros