prevents

avert avoid bar block counter forbid forestall halt hamper hinder impede inhibit limit preclude prohibit put an end to restrain restrict rule out stop thwart ward off

anticipate arrest baffle balk check chill cool cork counteract dam debar foil forfend frustrate intercept interdict interrupt obstruct obviate repress retard

defend against head off hold back hold off keep lid on nip in the bud put a stop to shut out stave off turn aside

advance aid allow approve assist continue encourage facilitate forward free help let go open permit promote push release support

abet heat liberate warm

cause