'Immovable' in the Bible

Now again I looked up, and four chariots were coming out from between two mountains; and the mountains were mountains of [firm, immovable] bronze (divine judgment).

But striking a reef with waves breaking in on either side, they ran the ship aground. The prow (forward point) stuck fast and remained immovable, while the stern began to break up under the [violent] force of the waves.

Therefore, my beloved brothers and sisters, be steadfast, immovable, always excelling in the work of the Lord [always doing your best and doing more than is needed], being continually aware that your labor [even to the point of exhaustion] in the Lord is not futile nor wasted [it is never without purpose].

But resist him, be firm in your faith [against his attack—rooted, established, immovable], knowing that the same experiences of suffering are being experienced by your brothers and sisters throughout the world. [You do not suffer alone.]