The word for today is…

acumen (noun):

: keenness and depth of perception, discernment, or discrimination especially in practical matters

Source : Merriam -Webster

Etymology : A keen mind and a sharp wit can pierce the soul as easily as a needle passes through cloth. Remember the analogy between a jabbing needle and piercing perception, and you will readily recall the history of acumen. Our English word retains the spelling and figurative meaning of its direct Latin ancestor, a term that literally means “sharp point.” Latin acumen traces to the verb acuere, which means “to sharpen” and is related to acus, the Latin word for “needle.” In its earliest English uses, acumen referred specifically to a sharpness of wit. In modern English, it conveys the sense that someone is perceptive enough to grasp a situation quickly and clever enough to apply that ability.

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David is a retired surgeon originally from London who came to New Zealand twenty-seven years ago after being delayed in Singapore for thirteen years on leaving the UK. He was coerced into studying Latin...