Final answer:
Rupture means the breakdown or separation between two families due to conflict or disagreement.
Step-by-step explanation:
"Family rupture" refers to a significant and often damaging disruption or breakdown in the relationships within a family. This rupture can take various forms, such as conflicts, estrangements, or breakdowns in communication, leading to a significant and negative impact on family dynamics.
Rupture, in this context, refers to the breakdown or separation between two families. It suggests a significant and often irreversible split, usually resulting from conflict or disagreement. In the sentence provided, 'no one remembers the reason for the two families rupture,' it means that the cause of the separation is unknown or forgotten.