the ability to understand quickly and clearly

ability to understand and reason

a strong desire to be successful

strong desire for success

enthusiasm (the more usual word)

enthusiasm

steady effort; showing of care and effort

perseverance in carrying out action

a strong feeling of admiration or interest

keen interest, excitement

the state, quality, of being intense; strength (of feeling etc)

passion, force

the state of judging or being judged; a decision of a judge or court

common sense

willingness

skill; eagerness

the power of delicate, artistic feeling; strong feeling of what is right, good etc

responsiveness; ability to feel

the feeling caused by a need to drink; suffering caused by this; to have a very strong wish for something

craving (especially for liquid)

skill; eagerness

skill; eagerness

great interest and effort

enthusiasm