dissension
noun [ U ] formal uk/dɪˈsen.ʃən/ us/dɪˈsen.ʃən/
（尤指组织、团体、政党等内部的）分歧，异议，争议
arguments and disagreement, especially in an organization, group, political party, etc.
There are signs of dissension within the ruling political party. 执政党内部出现了意见不一的迹象。