> A borrowing from French.
Etymons: French ampairer, empeirer, enpeirer.
< Anglo-Norman empeirier, emperer, empairer, enperir, ampairer, Old French enperer, amperier, Anglo-Norman and Old French empeirer, enpeirer, enpeirier, Anglo-Norman and Old French, Middle French empirer (French empirer) to grow worse (late 11th cent.), to weaken (early 12th cent.), to damage, to defile (both c1170), to suffer a setback (c1175), to fall ill (c1180), to diminish in social status (second half of the 12th cent.), to deteriorate, to come to harm (both end of the 12th cent.), to make worse (c1250), to debas…