Where does “flag” come from?

flag (Old Norse) comes from Proto-Germanic flaką, from Proto-Indo-European pleh₂- — flat.

Ancestry of “flag”, step by step

StepLanguageWordMeaning
1Proto-Germanicflakąsomething flat
2Proto-Indo-Europeanpleh₂-flat

Words derived from “flag”

Every word from Proto-Indo-European pleh₂- →Every word from Proto-Germanic flaką →