Morpheme
Dirt
Type
free base
Denotation
mud, soil, earth, dung, excrement, filthy substance
Etymology
Middle English drit, drytt; Old Norse drit
Evidence
dirt, dirtbag, dirtball, dirtbike, dirtbrain, dirtied, dirtier, dirties, dirtiest, dirtless, dirtlike, dirtproof, dirts, dirtwad, dirty, dirtying, undirty, washdirt
Notes
metathesis of and complete by 15c.