Affinity, in etymology affinity is the opposite of infinity . These two words have the same root coming from the Latin: finis = end. “Affinity” meaning is near to the “finis” for example close to the “zero point” in a before assumed space. On the other hand, from the Latin, affinis = connected with, having things in common, and it's utilised to interpret the effective possibility that some substances can or can't mix together, in terms of sympathies and… (More on Affinity)