This term describes what cannot be corrupted or destroyed. In moral contexts, it denotes integrity that cannot be compromised—judges who cannot be bribed, witnesses who cannot be bought, magistrates who remain honest. The word also carries a physical sense of imperishability, describing what endures without decay. Ancient Greek literature applied it both to character (uncorrupted, chaste) and to substance (not affected by decay). The dual meaning—moral incorruptibility and physical imperishability—often overlaps in biblical usage, where eternal realities are both morally pure and physically indestructible.