That your communion was unassailable, would not prove that mine was indefensible.
The use of this word in the sense of determined is not only inelegant but indefensible.
Can any thing more inexcusable and indefensible than this be imagined?
It accused her of some guiltiness, uncommitted and indefensible.
In the end it is the indefensible truth that lasts; it lasts because ...