dirtying

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the act of soiling something
• Syn:
soiling, soilure
• Derivationally related forms:
dirty, soil (for: soilure), soil (for: soiling)
• Hypernyms:
change of state
• Hyponyms:
staining, spotting, maculation, contamination, pollution