W: (adj) mild [Indirect via intense] (moderate in type or degree or effect or force; far from extreme) "a mild winter storm"; "a mild fever"; "fortunately the pain was mild"; "a mild rebuke"; "mild criticism"
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"
S: (adj) impregnable, inviolable, secure, strong, unassailable, unattackable (immune to attack; incapable of being tampered with) "an impregnable fortress"; "fortifications that made the frontier inviolable"; "a secure telephone connection"
S: (adj) solid, strong, substantial (of good quality and condition; solidly built) "a solid foundation"; "several substantial timber buildings"