* Inhibition: This is the most direct noun form, meaning a feeling of restraint or shyness.
* Inhibitor: This noun refers to something that inhibits, such as a chemical that slows down a reaction.
You can also use a phrase to express the concept, like:
* Act of inhibition: This is a more general way to describe the act of restraining something.
The best choice depends on the specific context and the meaning you want to convey.