The prefixes 'in-', 'im-', 'il-' and 'ir-' usually go with Latin-derived words
The 'un-' prefix is commonly used with words that end in '-ed' and '-able'
The prefix 'non-' can be attached to virtually any noun, adjective, or adverb. When adding 'non-' to a word, no hyphen is needed unless the word is a noun.
The prefixes 'de-' and 'dis-' are usually added to verbs to denote reversal of an action
The prefix 'a-' is added to adjectives ending in '-al'
The preffix 'anti-' means 'against'