block off
Found in thesaurus: obstruct,
occlude,
close up,
jam,
block,
impede,
obturate,
bar,
block off,
blockade,
stop,
barricade,
block up
block off
(v.) = anular, cancelar, ignorar.
Ex: A globalizing world so devoted to 'diversity,' as the present one is, can ill afford to block off one particular communication channel in favor of any other.