efficacious
ef·fi·ca·cious / ˌefiˈkāshəs/ • adj. formal (typically of something inanimate or abstract) successful in producing a desired or intended result; effective: the vaccine has proved both efficacious and safe.DERIVATIVES: ef·fi·ca·cious·ly adv.ef·fi·ca·cious·ness n.
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amicable , am·i·ca·ble / ˈamikəbəl/ • adj. (of relations between people) having a spirit of friendliness; without serious disagreement or rancor: there will be… atrocious , atrocious •factious, fractious •anxious • captious •precious, semi-precious •infectious •conscientious, contentious, licentious, pretentious, sentent… lact- , lact- stem of L. lac, lact- milk (cf. Gr. gála, galakt-; see GALAXY) in derivs.: lactation XVII(f. L. lactāre), lacteal XVII (f. L. lacteus), lacteou… capricious , capricious •factious, fractious •anxious • captious •precious, semi-precious •infectious •conscientious, contentious, licentious, pretentious, senten… Eliphelet , Eliphal (ĕl´īfăl, ēlī´fəl), the same as Eliphelet4.
Eliphalet (ēlĬf´əlĕt), in the Bible, name of two sons of David. Alternate forms are Eliphelet and… irrevocable , ir·rev·o·ca·ble / ˌiˈrevəkəbəl/ • adj. not able to be changed, reversed, or recovered; final: an irrevocable step. DERIVATIVES: ir·rev·o·ca·bil·i·ty…
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