To be strong and last a long time in spite of challenging use
(of an object, substance, or resource) of great value; not to be wasted or treated carelessly
Playful and full of energy
Not easily convinced, having doubts or reservations.
ADJECTIVE
Skeptical - Not easily convinced, having doubts or reservations.
When the detective was told that the death was an accident, he was skeptical, and he eventually solved the murder case and brought the criminal to justice.
Ability to understand things quickly and clearly, and to use the knowledge well
Full of energy and enthusiasm, feeling ready to accomplish something big
Pleasingly graceful and stylish in appearance or manner
ADJECTIVE
Astute - Ability to understand things quickly and clearly, and to use the knowledge well
From a very early age, Gail instinctively knew everything about business, and and after college she proved to be an astute business woman, and became a millionaire before the age of 30.