Definitions

1. verb

to free from a foul or impeding substance, or to purify

“The sailor carefully unfouled the anchor from the mud.”

2. verb

to clear or purify something from a foul or unpleasant quality

“The detergent helped unfoul the spoiled milk.”

3. noun

the act of freeing or purifying from a foul or impeding substance

“The process of unfouling the ship’s propeller took several hours.”