forestalled, headed off, helped, obviated, precluded, prevented, staved off

anticipated, providednegated, neutralized, nullifiedsavedbaffled, balked, checkmated, deterred, foiled, frustrated, thwartedbarred, blocked, hampered, hindered, impeded, interfered (with), retarded, stalleddeflected, fended (off), stopped, warded (off)avoided, circumvented, dodged, ducked, eluded, escaped, eschewed, evaded, shirked, shook, shunnedforbade(also forbad), inhibited, prohibitedarrested, checked, halted, stoppedcompensated (for), counteracted, counterbalanced, made up (for), offset

abetted, aided, assistedeased, facilitated, smoothed, uncloggedadvanced, cultivated, encouraged, forwarded, fostered, furthered, nurtured, promotedallowed, left, let, permitted