/**
 * @fileoverview Implementation of the Porter Stemmer algorithm for word normalization.
 * Used to reduce words to their root form (e.g., "running" to "run").
 */
/**
 * Stems a word using the [Porter
 * Stemmer](https://snowballstem.org/algorithms/porter/stemmer.html)
 * for removing inflectional endings like "ing", "ist", "ize".
 *
 * @author [Porter, M. (1980)](https://tartarus.org/martin/PorterStemmer/)
 * @param word - The word to be stemmed
 * @returns The stemmed word
 * @example const rootWord = stemWordToRoot("running"); // returns "run"
 * @category Topics
 */
export declare function stemWordToRoot(word: string): string;