A more thorough explanation:

Feal means faithful or truthful. It is an old-fashioned word that is not used much anymore.

• She was a feal friend who always kept her promises.
• The knight was feal to his king and would never betray him.

These examples show how feal means being loyal and honest. A feal friend is someone you can trust and rely on. A feal knight is someone who is devoted to their king and would never deceive them.