fealty

Inherited from Middle English feaute, feute, from Anglo-Norman fëauté, fëuté, from Latin fidēlitās (“faithfulness”; “homage, fealty” in Medieval Latin), from fidēlis (“faithful”) + -tās (noun suffix); the modern form (for expected *feauty /ˈfjuːti/) is due to learned influence. Equivalent to obsolete feal + -ty. Doublet of fidelity.