fuse

Any igniter that is used to initiate the burning of a propellant.

An electrical device that can interrupt the flow of electrical current when it is overloaded.

Mix together different elements.

Become plastic or fluid or liquefied from heat.

“The substances fused at a very high temperature”

Equip with a fuse; provide with a fuse.

Make liquid or plastic by heating.

“The storm fused the electric mains”