Synonyms for Disabling (same or very similar meaning)
WordNet sense 1 (depriving of legal right; rendering legally disqualified):
disqualifyingWordNet sense 2 (that cripples or disables or incapacitates):
crippling, incapacitatingWordNet sense 3 (detrimental to good health):
unhealthfulFrom the ODE community, based on WordNetadd/edit