Where does “vad” come from?

vad (Middle English) comes from Middle Dutch vade, from Old French fade, from Vulgar Latin fatidus, from Latin fatuus, from Latin fātus, from Latin for, from Proto-Italic fāōr, from Proto-Indo-European bʰéh₂ti — to speak, to be talking.

Ancestry of “vad”, step by step

StepLanguageWordMeaning
1Middle Dutchvadeweak, faint, limp
2Old Frenchfadeweak, witless
3Vulgar Latinfatidus
4Latinfatuusfoolish, silly, simple; stupid; insipid,...
5Latinfātusspoken, said, told, foretold, related, predicted; having or had spoken, etc
6Latinfor"defective"; I speak, talk, say
7Proto-Italicfāōrspeak
8Proto-Indo-Europeanbʰéh₂tito speak, to be talking
Every word from Proto-Indo-European bʰéh₂ti