To use a root word dictionary, type a root word into the search bar of the dictionary to obtain the necessary results. Websites that feature root word dictionaries include LearnThat.org and MacroEvolution.net. These websites also feature a search function based on the starting letter of the root word.
A root word is a word in any language that does not have any prefixes or suffixes. It is the prime derivative of many other words, and it may be used as a prefix or suffix, depending on the word's meaning. Many root words can stand alone as their own single units of meaning.