disagreement between people or within a group 意见分歧；（派性）纷争；不和 These issues caused bitter dissension in the party. 这些问题引起了党内的强烈分歧。 - dissension within something
dissension within the government 政府内部的意见分歧 - dissension between/among somebody
dissensions between rival factions 敌对派系之间的分歧
Word OriginMiddle English: via Old French from Latin dissensio(n-), from the verb dissentire ‘differ in sentiment’.