verb
jell
JEL/dʒel/
To become coherent, organized, or workable.
The designers' ideas jell into a single playground plan.

Etymology
Jelly becoming firm supplied the figurative sense of plans or ideas becoming organized and successful.
More examples
- The team needs time to jell.
- The story's separate ideas begin to jell.
Forms
jell
Similar words
- cohere
- Emphasizes parts forming a unified whole.
- crystallize
- Emphasizes becoming definite or clear.