What ia a suffix for the word energy?

There isn't a single, common suffix specifically for "energy." However, depending on the context and meaning you want to convey, you could use suffixes to create words like:

* Energetic: This is an adjective meaning full of energy or vigor.

* Energetically: This is an adverb meaning with energy or vigor.

* Energetics: This is a noun referring to the branch of physics dealing with energy.

* Energize: This is a verb meaning to give energy to.

* Energizer: This is a noun referring to something that energizes or a person who is full of energy.

You could also combine "energy" with other suffixes to create words related to specific types of energy, like:

* Solar energy: Energy from the sun.

* Kinetic energy: Energy of motion.

* Potential energy: Stored energy.

The best suffix to use will depend on the specific meaning and context of the word you want to create.