Not able to be denied or disputed; clearly established as true beyond any reasonable doubt.
From Latin prefix 'in-' (not) and 'controvertible' (able to be disputed), from 'controversia' (dispute). The word literally means 'cannot be turned against' in argument.
Think 'cannot be controversial' - incontrovertible facts are so solid that even the most argumentative person can't dispute them! They're controversy-proof.
Complete word intelligence in one call. Free tier — 50 lookups/day.