English Grammar: Affixes
Possible can be made negative in meaning by adding im-: impossible
Suffix - by adding -ly to the end of many adjectives, the adverb can be formed: cheerful- cheerfully
Infix - some languages add morphemes to the middle of the word, but this system is rarely used in English, except in expressions such as 'Fan-bloody-tastic', known as tmesis .
Prefixes & Suffixes