While "fort" itself isn't directly used as a word in English, it's a root that contributes to many words, such as:
* Fortify: To make stronger or more secure.
* Fortress: A strong, fortified building, often used for defense.
* Forte: A person's strong point or area of expertise.
* Fortitude: Courage in facing difficulty.
Therefore, the root word "fort" essentially conveys the concept of strength and defense.