fealty

 
Pronunciation: /ˈfiːəlti/

noun

[mass noun] historical
  • a feudal tenant’s or vassal’s sworn loyalty to a lord: they owed fealty to the Earl rather than the King
  • formal acknowledgement of loyalty to a lord: a property for which she did fealty

Origin:

Middle English: from Old French feau(l)te, fealte, from Latin fidelitas (see fidelity)