dirt

From Middle English drit (“excrement”), from Old Norse drit (“excrement”), from Proto-Germanic *dritą, *dritō (“excrement”), from Proto-Indo-European *dʰreyd-, *treydʰ- (“to have diarrhea”). Cognate with dialectal Danish and Norn drit (“excrement”), Norwegian dritt (“excrement”), dialectal Swedish dret (“shit”), Faroese and Icelandic drit (“bird excrement”), Dutch drijten (“to defecate”), drits (“dirt, mud, filth”), drijt and dreet (“excrement”), Low German drieten (“to defecate”), Driet (“shit”), regional German Driss (“shit”), Old English ġedrītan (“to defecate”).

The word originally referred to excrement before shifting to the current sense of "soil". For a semantic parallel, see Norwegian skitt (“dirt, filth, grime, mud”), from Old Norse skítr (“shit”), which is cognate with English shit.