potency

noun6

1. •
   Power, authority.

   • I would to heauen I had your potencie, And you were Isabell: should it then be thus? No: I would tell what 'twere to be a Iudge, and what a prisoner. — 1603
2. •
   Concentration; strength
3. •
   The ability or capacity to perform something
4. •
   Sexual virility: the ability to become erect or achieve orgasm.
5. •
   Potentiality, ability, capacity.
6. •
   (old-fashioned) Cardinality.