In John's gospel we read of Jesus speaking of those unto whom the word of God came, "and the scripture cannot be broken" (10:35). Jesus also said this, "If a man on the sabbath day receive circumcision, that the law of Moses should not be broken..." (7:23). In both cases the sense is clearly that of disregarding or violating the word of God. Yet even if people do disregard or violate the word of God, such "breaking" of it does not adversely affect the solid truth and worth of God's word. God's word remains intact no matter how humans view it, or treat it.
As with stumbling over Christ, the rock-mass, those who stumble damage themselves, not Christ. So with stumbling over the word of God - those who try to break it only break themselves. But those who tremble at God's word know this:
"For ever, O Lord, thy word is settled in heaven." Psalm 119:89 A.V.
"Thy word have I hid in my heart, that I might not sin against thee."
Psalm 119:11 A.V.
This means that no matter what people might do to twist God's word, or to disregard it, or to violate it, or to try to destroy it, they cannot touch that which is settled in heaven. They can sin against it, as do those who have not sunk God's word deep into their heart. But the word of God abides forever.