noun / verb
glue
GLOO/ɡluː/
A sticky substance that holds things together.
The glue joins the two wooden pieces.

Etymology
Latin gluten named sticky substances such as glue and beeswax. The English word retains that practical sense: material whose stickiness lets it fasten things together.
In context
it is the glue that holds everything together. It is designed to be a strong yet somewhat elastic adhesive.