To debase something by mixing it with something inferior is known as what?

The term that best fits the definition of "to debase something by mixing it with something inferior" is "alloy." In a metallurgical context, to alloy a metal involves mixing it with a different metal or other substance, often resulting in a material that has reduced purity or quality compared to its original state. This process typically involves combining metals or materials to create a new substance that may have desirable properties, but in some instances, it can diminish the purity of the original element.

The other terms present different meanings. "Blend" generally refers to mixing two or more substances together but does not inherently imply a reduction in quality or value. "Dilute" specifically means to make a substance weaker or less concentrated, often used in the context of liquids. "Combine" is a more general term that implies bringing two or more elements together but lacks the specific connotation of debasement associated with mixing in something inferior. This distinction highlights why "alloy" is the most appropriate choice for the given definition.