acumen
/ˈæk.jʊ.mən/Definitions
1. noun
the ability to make good judgments and decisions, especially in business or politics; a keen understanding and discerning judgment
“The CEO’s business acumen helped the company weather the economic downturn.”
2. noun
a sharp or clever idea or insight
“The professor’s acumen for the subject matter was evident in his thought-provoking lecture.”