The story
- Proto-Indo-European · inherited from*drukós
- Proto-Germanic · inherited from*trugą
- Proto-West Germanic · inherited from*trog
- Old English · inherited fromtroh
- Middle English · inherited fromtrogh
- English todaytrough
PIE word *dóru From Middle English trogh, from Old English troh, trog (“a trough, tub, basin, vessel for containing liquids or other materials”), from Proto-West Germanic *trog, from Proto-Germanic *trugą, *trugaz, from Proto-Indo-European *drukós, enlargement of *dóru (“tree”). See also West Frisian trôch, Dutch trog, German Trog, Danish trug, Swedish tråg; also Middle Irish drochta (“wooden basin”), Old Armenian տարգալ (targal, “ladle, spoon”). More at tree.
Etymology from Wiktionary, CC BY-SA 4.0.