Some words also have more than one meaning when implemented in different contexts.
Hence my differentiating between "Sadism" in the personality/behavioral sense, and sadism as it pertains to the nomenclature of BDSM culture.
Trying to claim that any given word has a singular definition in every context will create a nonstarter of a dialogue, though, so if you refuse to acknowledge that context and accepted use matter, then yes, there's nothing to be gained from trying to explain or discuss this with you.