root is a word with multiple meanings in English:
1. In botany, the root is the part of a plant that grows underground.
2. In mathematics, a root refers to a value that satisfies an equation.
3. In linguistics, a root is the most basic form of a word.
4. In computing, root refers to the highest-level directory in a file system.
5. In Unix/Linux systems, root is the superuser account with full privileges.