Fealty (noun)

Loyalty to a lord or a king; the obligation of a vassal to be loyal to his lord.

Origin:

Middle english fealti, from old french fealté, from latin fidelitas "fidelity", from fidelis "faithful".

Examples:

1. The knight swore fealty to the king.
2. The feudal system was based on the principle of fealty and loyalty between lords and vassals.
3. The oath of fealty required the vassal to be faithful and to protect the lord's interests.
4. Fealty was pledged by the vassals to the lord in a ceremony.
5. The feudal relationship between lords and vassals was based on mutual obligations of fealty.