Where does “cad é an chúis” come from?

cad é an chúis (Irish) comes from Irish cad, from Irish cad é, from Irish cáidhe, from Old Irish cote, from Old Irish co, from Proto-Celtic kom, from Proto-Indo-European ḱóm, from Proto-Indo-European ḱe — to bend; curve; arch; vault; to bow, bend, arch,...

cad é an chúis (Irish): why interrogative

Definitions

  1. why interrogative

Ancestry of “cad é an chúis”, step by step

cad é an chúis traces back through 3 separate lines of ancestry.

via Irish cad

StepLanguageWordMeaning
1Irishcadwhat; where
2Irishcad éwhat?
3Irishcáidhe
4Old Irishcoteof what sort is…?
5Old Irishcowith; how?; to, toward
6Proto-Celtickomwith, co-
7Proto-Indo-Europeanḱómbeside, near, by, with
8Proto-Indo-EuropeanḱeDeictic particle, here; Post-positional...
9Middle Englishkyt
10Germankittputty certain kinds of cement used for fixing e.g. window panes
11Old High Germankuti
12Proto-West Germanickwidugum, resin
13Proto-Germanickweduzresin
14Proto-Indo-Europeangʷet-resin, gum; to say, speak
15Proto-Indo-Europeangū-to bend; curve; arch; vault; to bow, bend, arch,...

via Irish án

StepLanguageWordMeaning
1Irishánbright, brilliant; splendid, noble
2Old Irishínfast, period of fasting
3Proto-Celticsindosthis
4Proto-Indo-Europeansḗmone
5Proto-Indo-Europeansem-together, one

via Irish é

StepLanguageWordMeaning
1Irishéhe, him; it
2Old Irishéhe; it; they
3Proto-Indo-Europeanéythe; demonstrative pronoun; this one, he
4Proto-Indo-Europeanh₁e-
Every word from Proto-Indo-European gū-Every word from Proto-Indo-European gʷet-Every word from Proto-Germanic kweduz