What is the comparative and superlative degree foul?

"Foul" is an adjective that doesn't typically have comparative and superlative forms. It's not something you would describe as being "more foul" or "most foul" in the way you might with adjectives like "big" or "beautiful."

Here's why:

* Foul usually describes something unpleasant, offensive, or dirty. It's often used in a very strong sense.

* Comparative and superlative forms are usually used for adjectives that can be scaled or measured.

Instead of using comparative and superlative forms for "foul," you could:

* Use adverbs: "This smells more strongly," "This is the most offensive smell I've ever encountered."

* Use synonyms: "This is more disgusting," "This is the most horrible thing I've ever seen."

* Use different phrases: "This is even worse," "This is the worst I've ever experienced."

The specific wording would depend on the context and what you're trying to express.