Where does “sine” come from?

sine (Middle English) comes from Old French signe, from Latin signum, from Proto-Italic seknom, from Proto-Indo-European sek- — to cut, cut off, sever.

Ancestry of “sine”, step by step

StepLanguageWordMeaning
1Old Frenchsignesign; signal
2Latinsignumvisible indication: sign, mark, signal; seal,...
3Proto-Italicseknomsign
4Proto-Indo-Europeansek-to cut, cut off, sever

Words derived from “sine”

Every word from Proto-Indo-European sek- →Every word from Proto-Italic seknom →Every word from Latin signum →