Which term refers to a compound that has a high affinity for a specific receptor and inhibits agonist binding producing no activation?

The term that describes a compound with a high affinity for a specific receptor, which inhibits agonist binding without producing any activation, is a full antagonist. Full antagonists bind to receptors and block the action of agonists, effectively preventing them from eliciting their effects.

This high affinity means that the full antagonist can effectively compete with agonists for binding to the receptor, successfully inhibiting the receptor's activation. Since full antagonists do not activate the receptor at all upon binding, they are used to counteract the effects of agonists that would normally activate that receptor, thereby producing a complete blockade of the receptor's activity.

Other terms, such as full agonist or partial agonist, refer to compounds that activate receptors in varying degrees. A full agonist would activate the receptor fully, while a partial agonist activates it but to a lesser extent than a full agonist. The mixed agonist-antagonist could exert both agonist and antagonist properties depending upon the binding context but does not fit the description of purely inhibiting agonist binding and producing no activation.