When two people are unbridgeable, they are unable to overcome their differences. They might be angry with each other, and they will never be able to get past that.
The unbridgeable differences between the two parties caused the conflict.
The unbridgeable difference between the two families caused the feud.
ADJ
not bridgeable
1
The article talks about irreconcilable differences and an unbridgeable schism.
2
The Son of God in the Incarnation crossed the unbridgeable chasm between them.
3
Perhaps this difference of view is unbridgeable.
4
A salute across an unbridgeable chasm.
5
And if the dispute is unbridgeable, then we do have a real problem.
6
They have crossed an unbridgeable chasm by accepting another religion.