"contaminated" in the verb sense
1. pollute, foul, contaminate
make impure
"The industrial wastes polluted the lake"
2. contaminate
make radioactive by adding radioactive material
"Don't drink the water
"contaminated" in the adjective sense
1. contaminated
corrupted by contact or association
"contaminated evidence"
2. contaminated, polluted
rendered unwholesome by contaminants and pollution
"had to boil the contaminated water"
"polluted lakes and streams"
Source: WordNet® (An amazing lexical database of English)
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