He is a strong person.

Fundamental interaction is one of the most important forces in physics.

Electromagnetic interaction is one of the fundamental forces used to explain the force between substances.

I could feel his strength in his words.

He believes in his own power.

He believes in his knowledge power.

He has an astonishing amount of physical strength.

He believes in his own strength.

You always become my strength, thank you very much.

Please research the interaction between these two drugs.