noun
cohesion
koh-HEE-zhun/kəʊˈhiːʒn/
The quality of parts holding together as a whole.
The water's cohesion holds it together as droplets merge on the leaf.

Etymology
The pieces express the act or state of sticking together. That physical image also describes unity: separate members hold together as one whole.
In context
… the glue that ties everything together. Cohesion you can actually feel. One of the easiest ways to make a room feel well-designed is through quiet repetition.
More examples
- The dough lacks cohesion and crumbles when I roll it.
- A recurring theme gives the essay cohesion.
- Regular neighborhood gatherings help build social cohesion.
Forms
cohere verb — To hold together as a whole.
cohesive adjective — Holding together as a unified whole.