This is the 3345th most frequent Korean word.
내전
Civil war.
Here, '내전' is used to mean 'civil war', referring to an internal conflict within a country.
내전으로 인해 많은 사람들이 고통을 겪고 있다.
Many people are suffering due to the civil war.
'내전' in this sentence refers to an internal dispute or conflict, applied here in the context of a disagreement among students.
학생들의 내전 문제롭게 해결해야 한다.
The civil dispute among the students must be resolved appropriately.
In this context, '내전' encompasses the broader idea of internal conflict or discord, not limited to physical confrontations but any situational inner dispute.