verb
subdivide
sub-duh-VYDE/ˈsʌbdɪvaɪd/
To divide into smaller parts.
The short borders subdivide half the garden bed into three smaller plots.

Etymology
Here sub- marks a further division: portions already separated are divided again. That original sense explains the emphasis on making smaller parts.
In context
we need to be careful about how many channels we end up having because it could easily proliferate and subdivide
More examples
- The developer plans to subdivide the land into residential lots.
- She subdivides each task into manageable steps.
- The report is subdivided into sections by topic.
Forms
subdivide · subdivides · subdivided · subdividing
subdivision noun — The act or result of further division.