ac ‧ u ‧ men /ˈækjəmən, ˈækjʊmən, əˈkjuːmən/ BrE AmE noun [uncountable]
[ Date: 1500-1600 ; Language: Latin ; Origin: 'point' , from acuere ; ⇨ ↑ acute ]
the ability to think quickly and make good judgments
business/political/financial etc acumen
The firm’s success is largely due to Brannon’s commercial acumen.