S: (adj) potent, strong (having or wielding force or authority) "providing the ground soldier with increasingly potent weapons"
S: (adj) potent, strong, stiff (having a strong physiological or chemical effect) "a potent toxin"; "potent liquor"; "a potent cup of tea"; "a stiff drink"
W: (adj) impotent [Opposed to: potent] (lacking power or ability) "Technology without morality is barbarous; morality without technology is impotent"- Freeman J.Dyson; "felt impotent rage"