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adj. Incapable of being morally corrupted.

adj. Not subject to corruption or decay.

adj. Not possible to corrupt; not subject to corruption.

adj. Not corruptible; incapable of corruption, decay, or dissolution.

adj. Incapable of being bribed or morally corrupted; inflexibly just and upright.

n. One of a religious sect which arose in Alexandria, in the reign of the Emperor Justinian, and which believed that the body of Christ was incorruptible, and that he suffered hunger, thirst, pain, only in appearance.

Not corruptible physically; incapable of corruption or decay.

Not corruptible morally; not liable to perversion or debasement; that cannot be affected by contaminating influences, especially bribery or hope of gain or advancement: as, incorruptible principles; an incorruptible judge.

Eccles., the Aphthartodocetæ.

adj. incapable of being morally corrupted

"The old man may have queered his own promotion but he was still known as the incorruptible and his judgment on the promotions of others was prized."

incorrupt   

unchangeable    unselfish    indestructible    immortal    imperishable    inviolable    virtuous    courageous    unimpeachable    high-minded