FOIN

PRONUNCIATION: (foin)

MEANING: verb intr.: To thrust with a weapon; lunge.
noun: A thrust with a weapon.

ETYMOLOGY: From Old French foine (trident), from Latin fuscina (trident). Earliest documented use: verb 1400, noun: 1450.
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FOING - making unnecessary enemies

LOIN - to learn in a Brooklyn school (and not necessarily about cuts of meat, either!)

FORIN (sometimes FORN) - not domestic