分裂

The cells began to divide rapidly.

cell division

nuclear fission

A small group split off and formed a new party.

Uphold unity and oppose secession.

The church severed into two factions.

split in the party

splitting activities; separatist activity

divisive elements; splittists

nation in division; disunited nation

break into several factions

stir up division

cause division in society

engage in splittism/separatism

split the country