IPA: /ˈkiːn.nəs/
KK: /ˈkinəs/
The quality of being eager or enthusiastic about something; a strong interest or desire to learn or do something.
Her keenness for learning new languages impressed her teachers.
Keenness is derived from "keen" (from Old English "cyn", meaning sharp or acute) and the suffix "-ness" (meaning the state or quality of). The word "keenness" refers to the quality of being sharp or intense, whether in terms of perception, enthusiasm, or intellect.
Think of 'sharpness' ('keen') and how it relates to the 'quality' ('-ness') of being sharp or intense. This helps you remember that keenness refers to a sharp or intense quality.