1. Intense interest, enthusiasm, or eagerness about something
Her keenness for learning new languages impressed everyone.
Seu entusiasmo em aprender novos idiomas impressionou a todos.
2. Sharpness or acuteness of perception, intellect, or senses
The keenness of his eyesight allowed him to spot details others missed.
A agudeza de sua visão permitiu que ele identificasse detalhes que outros perdiam.
3. The quality of being sharp or keen (in reference to edges or blades)
The keenness of the blade made cutting effortless.
A agudeza da lâmina tornou o corte sem esforço.