Pre-fixes and suffixes are groups of letters that are added to the beginning or end of root words to change their meaning. A prefix is added to the front, a suffix to the end, and the root word is the base without affixes. Examples show how prefixes like "re", "in", "im", and "anti" and suffixes like "ing", "s", "ilities", and "able" modify root words to form new words with different meanings.

1. Pre-fixes and Suf-fixes

2. Pre-fixA pre-fix is a grouping of letters that are added to the beginning of a word to change the meaning of the root word.

3. Root word A root word is a basic word without a pre-fix.Think of it as a root is the beginning of the tree and the limbs and leaves are the pre-fix and suf-fix.

4. Suf-fixA suffix is a grouping of letters that we add to the end of the root word and could change the meaning of the word.

5. Examples PrefixReInImPreAntiRoot WordTestDeedPossiblePaidBiotic SuffixIngSIlitiesAbleSNew wordRetestingIndeed or deedsImpossible or possibilitiesPrepaid or payableAntibiotic or antibiotics