Where does “anniversary” come from?

anniversary (Middle English) comes from Medieval Latin anniversaria, from Latin anniversārius, from Latin versus, from Latin vertō, from Proto-Italic wertō, from Proto-Indo-European wert-, from Proto-Indo-European wer- — to burn; to cover, heed, notice; squirrel.

Ancestry of “anniversary”, step by step

StepLanguageWordMeaning
1Medieval Latinanniversarianominative feminine singular of anniversārius;...
2Latinanniversāriusannual, yearly
3Latinversusturned, changed, having been turned; towards,...
4Latinvertōto turn, turn oneself, direct one's way, to turn about, turn around, revolve
5Proto-Italicwertōto turn
6Proto-Indo-Europeanwert-to turn, to rotate
7Proto-Indo-Europeanwer-to burn; to cover, heed, notice; squirrel

Words derived from “anniversary

Every word from Proto-Indo-European wer-Every word from Proto-Indo-European wert-Every word from Proto-Italic wertō