verb
jell
JEL/dʒel/
To set into a firm coherent mass.
The fruit mixture jells into a firm mass that holds its shape.

Etymology
Probably a back-formation from jelly, jell originally meant to take on jelly’s consistency. That physical firming became an image for plans, ideas, or groups becoming coherent and effective.
More examples
- The jam hasn't jelled yet.
- The cooled fruit juice begins to jell in the mold.
- The gelatin mixture is jelling in the refrigerator.
Forms
jell · jells · jelled · jelling