Prefixes and suffixes are small groups of letters that are added to the beginning or end of a word to change its meaning.
A prefix is a group of letters that is added to the beginning of a word to modify its meaning. For example, the prefix "un-" can be added to the word "happy" to create the word "unhappy," which means not happy. Other common prefixes include "re-" (again), "pre-" (before), and "post-" (after).
A suffix, on the other hand, is a group of letters that is added to the end of a word to change its meaning. For example, the suffix "-er" can be added to the word "teach" to create the word "teacher," which refers to someone who teaches. Other common suffixes include "-ing" (ongoing action), "-ly" (in a manner of), and "-able" (capable of).
By using prefixes and suffixes, we can create many new words from existing ones.