Definitions

1. verb

to make something unclean or dirty

“The muddy boots unkened the entire floor.”

2. verb

to foul or contaminate (water, air, etc.)

“The industrial plant unkened the river with toxic waste.”

3. verb

to befoul or pollute (an environment)

“The litter on the beach unkened the otherwise beautiful view.”

4. noun

a foul or polluted substance

“The unken in the river caused a massive fish kill.”