appreciable(large enough to be estimated; considerable) adjective [UK: ə.ˈpriːʃ.əb.l̩] [US: ə.ˈpriːʃ.əb.l̩]
considerable(worth considering) adjective [UK: kən.ˈsɪ.də.rəb.l̩] [US: kən.ˈsɪ.də.rəb.l̩]He has a considerable income. = Él tiene unos ingresos considerables.
considerablemente adverb
considerably(significantly) adverb [UK: kən.ˈsɪ.də.rə.bli] [US: kən.ˈsɪ.də.rə.bli]Traffic has gone down considerably. = El tráfico se ha reducido considerablemente.
quite(to the greatest extent; completely) adverb [UK: kwaɪt] [US: ˈkwaɪt]