"acuteness" in the noun sense
a sensitivity that is keen and highly developed
"dogs have a remarkable acuteness of smell"
2. acuteness, acuity, sharpness, keenness
a quick and penetrating intelligence
"he argued with great acuteness"
"I admired the keenness of his mind"
the quality of having a sharp edge or point
Source: WordNet® (An amazing lexical database of English)
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