From meta (after) and hodos (way). Literally 'a following after' — hence a method, scheme, or crafty strategy. Used exclusively of Satan's deceptive tactics in Ephesians.
Paul warns believers to put on the full armor of God so they can stand against the schemes of the devil (Ephesians 6:11). He also warns against being carried about by every wind of doctrine through the craftiness of men (Ephesians 4:14). The word reveals that Satan does not operate randomly — he employs strategic, calculated deception. This is why believers need not just moral strength but spiritual armor and discernment.