fealty

/ˈfē(-ə)l-tē/

Middle English feute, fealtye, borrowed from Anglo-French feelté, fealté, going back to Latin fidēlitāt-, fidēlitās "faithfulness, loyalty"

noun

  1. the fidelity of a vassal or feudal tenant to his lord

  2. the obligation of such fidelity

  3. intense fidelity

The vassal vowed fealty to the king.

fidelity allegiance fealty loyalty devotion piety mean faithfulness to something to which one is bound by pledge or duty. fidelity implies strict and continuing faithfulness to an obligation, trust, or duty. allegiance suggests an adherence like that of citizens to their country.