effective
A2Adjektiv/US /ɪfˈɛktɪv/ ĭf-ĔKT-ĭv; UK /ɪfˈɛktɪv/ ĭf-ĔKT-ĭv/
Having the power to produce an effect or effects; producing a decided or decisive effect; efficient; serviceable; operative; as, an effective force, remedy, speech; the effective men in a regiment.
