Here's why:
* Cognates: Words related in origin, like "father" in English and "padre" in Spanish, are called cognates. They are descended from the same ancestral word.
* Root: The root of a word is the basic form of the word, after all affixes (prefixes and suffixes) have been removed. For example, the root of "unbreakable" is "break".
In essence, the root of a word is the core element that gives it its basic meaning and connects it to other related words (cognates).