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. 这些问题在党内引起了激烈的争论。 - dissension within something
dissension within the government 政府内部的意见分歧 - dissension between/among somebody
dissensions between rival factions 对立派别之间的纷争
Word OriginMiddle English: via Old French from Latin dissensio(n-), from the verb dissentire ‘differ in sentiment’.