The Collaborative International Dictionary of English v.0.48:
Shrilly \Shril"ly\, adv. In a shrill manner; acutely; with a sharp sound or voice. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Shrilly \Shril"ly\, a. Somewhat shrill. [Poetic] --Sir W. Scott. [1913 Webster] Some kept up a shrilly mellow sound. --Keats. [1913 Webster]WordNet (r) 3.0 (2006):
shrilly adv 1: in a shrill voice; "she sang rather shrilly" [syn: shrilly, piercingly]