Where does “trygð” come from?

trygð (Old Norse) comes from Proto-Germanic triwwiþō, from Proto-Indo-European dóru, from Proto-Indo-European drew- — hard, firm, strong, solid; hard, fast; tree.

Ancestry of “trygð”, step by step

StepLanguageWordMeaning
1Proto-Germanictriwwiþōpromise, contract
2Proto-Indo-Europeandórutree
3Proto-Indo-Europeandrew-hard, firm, strong, solid; hard, fast; tree

Words derived from “trygð

Every word from Proto-Indo-European drew-Every word from Proto-Indo-European dóruEvery word from Proto-Germanic triwwiþō