Definition of the word well grounded

The phrase "well grounded" is an adjectival phrase that describes something having a strong foundation or background in a particular subject, discipline, or knowledge. It has its origins in the 15th century when the term "ground" meant "understanding" or "fundamental principles." The word "well" was added to emphasize the depth and extensiveness of the knowledge or understanding. In medieval times, scholars would often refer to their students as "well grounded" to indicate that they had been thoroughly trained in logic, grammar, and rhetoric, the three pillars of a liberal education. Today, the term is still used to convey a similar meaning, but it is also commonly applied to technical abilities and skills, such as a "well-grounded" electrical engineer or a "well-grounded" athlete who has received rigorous instruction and training in their respective fields.