The quality or degree of being effective; the ability to produce or achieve the desired result.
From 'effective' (capable of producing effect) plus the suffix '-ity' (quality of). Traces back through Old French to Latin 'effectivus.'
In organizational psychology and medicine, 'effectivity' measures not just whether something works, but how well it works—it's about the degree and efficiency of impact, making it more nuanced than simply 'working' or 'not working.'
Complete word intelligence in one call. Free tier — 50 lookups/day.