Where does “threed” come from?

threed (Middle English) comes from Old English þrǣd, from Proto-Germanic þrēduz, from Proto-Indo-European treh₁-tu-, from Proto-Indo-European terh₁- — to rub, turn; to drill, pierce.

Ancestry of “threed”, step by step

StepLanguageWordMeaning
1Old Englishþrǣd—
2Proto-Germanicþrēduzthread, twisted fibre
3Proto-Indo-Europeantreh₁-tu-—
4Proto-Indo-Europeanterh₁-to rub, turn; to drill, pierce
Every word from Proto-Indo-European terh₁- →Every word from Proto-Indo-European treh₁-tu- →Every word from Proto-Germanic þrēduz →