incontrovertible
Concise Oxford English Dictionary © 2008 Oxford University Press:
incontrovertible/ɪnkɒntrəˈvɜːtəbl/
▶adjective not able to be denied or disputed.
– derivatives
incontrovertibility noun,
incontrovertibly adverb.
incontrovertibility noun,
incontrovertibly adverb.
'incontrovertible' also found in these Oxford entries:

