divide

a serious disagreement between two groups of people (typically producing tension or hostility)

a ridge of land that separates two adjacent river systems

separate into parts or portions; "divide the cake into three equal parts"; "The British carved up the Ottoman Empire after World War I"

perform a division; "Can you divide 49 by seven?"

act as a barrier between; stand between; "The mountain range divides the two countries"

come apart; "The two pieces that we had glued separated"

make a division or separation

force, take, or pull apart; "He separated the fighting children"; "Moses parted the Red Sea"