acumen
‘sharpness of intellect’
Lexical development traced from the Tamil root:
Lat. acumen ‘a point, sting’ < acuere ‘to sharpen’ < acus ‘a needle’ < ak < ak- < Tamil akku
Technical words derived from 'acumen'
business acumen - வணிக நுண்திறன்
acumen
English words derived from akku connoting 'sharpness'