effective

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ef·fec·tive / iˈfektiv/ • adj. 1. successful in producing a desired or intended result: effective solutions to environmental problems. ∎  (esp. of a law or policy) operative: the agreements will be effective from November.2. fulfilling a specified function in fact, though not formally acknowledged as such: the companies were under effective Soviet control. ∎  assessed according to actual rather than face value: an effective price of $176 million. ∎  impressive; striking: an effective finale.DERIVATIVES: ef·fec·tive·ness n.ef·fec·tiv·i·ty / ˌefekˈtivitē; ˌēfek-/ n.

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