Where does “gaga” come from?

gaga (Bikol Central) comes from Spanish gagá, from French gaga, from French gâter, from Middle French gaster, from Old French gaster, from Latin vastus, from Proto-Celtic wāstos, from Proto-Indo-European h₁weh₂- — to leave, abandon, give out.

Ancestry of “gaga”, step by step

StepLanguageWordMeaning
1Spanishgagágaga
2Frenchgagagaga (senile)
3Frenchgâterto spoil, ruin; to go bad, go off
4Middle Frenchgasterto waste; to destroy
5Old Frenchgasterto waste; to destroy
6LatinvastusEmpty, unoccupied, i.e. waste, desert; Desolate,...
7Proto-Celticwāstosempty
8Proto-Indo-Europeanh₁weh₂-to leave, abandon, give out
Every word from Proto-Indo-European h₁weh₂-Every word from Proto-Celtic wāstosEvery word from Latin vastus