Where does “dotardy” come from?

dotardy (English) comes from English dotard, from Middle English dotard, from Middle English -ard, from Old French -ard, from Frankish -hard, from Proto-Germanic harduz, from Proto-Indo-European kert-, from Proto-Turkic *keŕ- — to travel, tour.

Ancestry of “dotardy”, step by step

StepLanguageWordMeaning
1EnglishdotardAn old person with impaired intellect; one in his...
2Middle EnglishdotardA dotard; someone who displays senility; A fool...
3Middle English-ardard
4Old French-ardpejorative agent noun
5Frankish-hardhardy, bold
6Proto-Germanicharduzhard; brave
7Proto-Indo-Europeankert-times; to weave, twist together; time
8Proto-Turkic*keŕ-to travel, tour
Every word from Proto-Turkic *keŕ-Every word from Proto-Indo-European kert-Every word from Proto-Germanic harduz