(n.) The ability to perceive keenly and readily\.

acridity acumen acumination acuteness adroitness agility alertness apperception aptitude aptness astuteness attention attentiveness braininess brightness brilliance clear thinking cleverness cogency dexterity discernment edge esprit farseeingness farsightedness flair foresight foresightedness genius giftedness gifts incisiveness insight keen-wittedness keenness longheadedness longsightedness mental alertness mercurial mind mucronation native cleverness nimble mind nimble-wittedness nimbleness nous penetration perception perceptiveness percipience perspicaciousness perspicacity perspicuity perspicuousness pointedness prickliness promptitude promptness providence punctuality quick parts quick thinking quick wit quick-wittedness quickness readiness ready wit sagaciousness sagacity savvy sensibility sharp-wittedness sharpness sleeplessness smartness smarts spinosity sprightly wit talent thorniness trenchancy wakefulness