[n] harshness of manner
[n] the quality of being sharp and clear
[n] thinness of edge or fineness of point
[n] a sharp bitter taste property
[n] the attribute of urgency; "his voice had an edge to it"
[n] a quick and penetrating intelligence; "he argued with great acuteness"; "I admired the keenness of his mind"
[n] having a sharp bitter flavor