say it: in-di-FEN-suh-buhl
indefensible is an adjective meaning "(of theories etc) incapable of being defended or justified". It carries 3 recorded senses.
(of theories etc) incapable of being defended or justified
not able to be protected against attack
incapable of being justified or explained
Definitions, synonyms and semantic relations for indefensible come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.