Intermediate (B1)
IPA: /ˈfaʊlɪŋ/
KK: /ˈfaʊlɪŋ/
Definition
The process of unwanted material sticking to a surface, which can make it less effective or functional.
Example
The fouling of the ship's hull caused it to move slower in the water.
Conversation

I was cleaning my boat yesterday and noticed some fouling on the hull.

Oh no! That can really affect its performance.

Yeah, I didn’t realize how quickly the fouling can build up.

It happens! Regular maintenance is key to keeping it in good shape.
Synonyms & Antonyms
Synonyms
contamination
pollution
tainting
Antonyms
purification
cleanliness
clarity
Definition
To make something dirty or polluted, often by adding unwanted substances.
Example
The oil spill is fouling the water in the bay.
Tense Forms
Past: fouled
Past Participle: fouled
Conversation

I can't believe how many players are fouling each other in the game.

I know, right? It makes it so frustrating to watch.

Exactly! They should just play fair and avoid fouling when possible.
Root Explanation
Fouling → The word 'fouling' originates from the Old French 'fouler', meaning to trample or press down. It refers to the act of making something dirty or unclean, often by the accumulation of unwanted substances.
Memory Tip
Think of 'fouler' meaning to trample or press down, which helps you remember that 'fouling' means making something dirty or unclean.
Visually Confused Words
fourling
foundling
fulling
fowling
fopling
fooling
folding
foiling