What is the suffixes of legal?

There aren't any suffixes for the word "legal" itself. It's already a complete word with no parts added on at the end.

However, there are words derived from "legal" that use suffixes:

* Legally: This uses the suffix "-ly" to turn the adjective "legal" into an adverb.

* Legality: This uses the suffix "-ity" to turn the adjective "legal" into a noun.

* Legalize: This uses the suffix "-ize" to turn the adjective "legal" into a verb.

So, while "legal" itself doesn't have suffixes, you can use these suffixes to create related words with different grammatical functions.