splitting
v.v. dividing something into two or more parts. You use this when sharing a cost with friends or breaking a large group into smaller ones.
v. dividing or separating a whole into distinct parts or layers. Often used to describe the distribution of resources, costs, or the physical cleavage of a substance.
We are splitting the bill for dinner tonight.
The manager is splitting the team into two groups to handle the new project more efficiently.
By splitting the atom, scientists released an immense amount of energy, fundamentally changing our understanding of physics and power generation.
The verb is transitive when used with an object like 'the bill' or 'the wood', but can be intransitive when describing something that breaks apart on its own.
We are splitting up the bill.We are splitting the bill.'Split up' usually refers to ending a romantic relationship or physically separating a crowd; for dividing costs, use 'split' alone.