effectivity C2+ Topic:Time US /ɪˌfɛkˈtɪvəti/ UK /ɪˌfɛkˈtɪvəti/ See IPA manual Meanings 1 noun the quality of being effective; the date a thing takes effect The contract specifies an effectivity of the first of the month. Thesaurus Synonyms 1 noun · the quality of being... effectivenessefficacyefficacitypotency ↔ Opposites ineffectivenessinefficacy Word family Related forms effectiveeffecteffectual Etymology AI details From effective (from Latin effectīvus, from efficere 'to accomplish') + -ity. effectīvus Latin efficere Latin facere Latin View etymology graph -> Topics Time Word Formation & Derivatives External links Cambridge Dictionary Wiktionary Google Images # effectivity **Type:** Word **Level:** C2+ **Part of speech:** noun **IPA (US):** /ɪˌfɛkˈtɪvəti/ **IPA (UK):** /ɪˌfɛkˈtɪvəti/ ## Meanings 1. the quality of being effective; the date a thing takes effect ## Examples - The contract specifies an effectivity of the first of the month. ## Synonyms - effectiveness - efficacy - efficacity - potency ## Antonyms - ineffectiveness - inefficacy ## Related Forms - effective - effect - effectual ## Roots and Affixes - Root: effectīvus - Root: efficere - Root: facere ## Etymology From effective (from Latin effectīvus, from efficere 'to accomplish') + -ity. ## AI Etymology Effectivity is from effective (from Latin effectīvus, from efficere 'to accomplish') + -ity. Important recorded forms include effectīvus (Latin), efficere (Latin), and facere (Latin). Morphologically, the word is a built form whose named elements carry part of the historical sense. The current sense covers the quality of being effective; the date a thing takes effect. The wider family includes related words such as effective, effect, and effectual. ## Topics - Time - Word Formation & Derivatives markdown