potent

adj

1.
having great influence
powerful
2.
having or wielding force or authority
strong
Derived from:
potency
3.
having a strong physiological or chemical effect
stiff strong
Antonym:
impotent
Derived from:
potency
4.
(of a male) capable of copulation
virile
Antonym:
impotent
Derived from:
potency