INDEFENSIBLE n.
Not defensible; not capable of being defended, maintained, vindicated, or justified; unjustifiable; untenable; as, an indefensible fortress, position, cause, etc. Men find that something can be said in favor of what, on the very proposal, they thought utterly indefensible. Burke.
WARRANTABLE a.
Authorized by commission, precept, or right; justifiable; defensible; as, the seizure of a thief is always warrantable by law and justice; falsehood is never warrantable. His meals are coarse and short, his employment warrantable, his sleep certain and refreshing. South. -- War"rant*a*ble*ness, n. -- War"rant*bly, adv…