Acuities refer to sharpness, keenness, or intensity of perception or understanding. Thus, antonyms for this word would be those conveying the opposite meaning, i.e., dullness, bluntness, or insensitivity. Lack of sensitivity could also be termed as numbness, apathy, or imperception. The antonyms for acuities could also be interpreted as imprecision, vagueness, or ambiguity. A person having low acuities may face difficulties in comprehending or perceiving things, leading to confusion or chaos. Improving the acuities means bringing focus and clarity to one's perception or understanding, which can be achieved through constant learning, practice, or mindfulness.