Dictionary
in•de•fen•si•ble
Pronunciation: (in"di-fen'su-bul), [key]—
adj.
1. not justifiable; inexcusable:
indefensible behavior.
2. incapable of being protected or defended against attack:
an indefensible town.
3. incapable of being defended against criticism or denial; untenable:
indefensible argument. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.