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.
INOFFENSIVE a. 3 definitions
Giving no offense, or provocation; causing no uneasiness, annoyance, or disturbance; as, an inoffensive man, answer, appearance.
OFFENSE; OFFENCE n. 3 definitions
The act of offending in any sense; esp., a crime or a sin, an affront or an injury. Who was delivered for our offenses, and was raised again for our justification. Rom. iv. 25. I have given my opinion against the authority of two great men, but I hope without offense to their memories. Dryden.