Soundingly

adv. [f. SOUNDING ppl. a.¹ + -LY².] In a sounding manner; so as to emit or cause a sound, esp. a loud sound or noise; sonorously, imposingly.

1697.  J. Sergeant, Solid Philos., 70. Those which by the smart motion of the Ayr, do come in thro’ the Drum of the Ear,… do affect it with a kind of vibration, or (as we may say) Soundingly.

1844.  Dickens, Mart. Chuz., xiii. Ye Pharisees,… who soundingly appeal to human nature. Ibid. (1865), Mut. Fr., xvi. No attendant to slap him soundingly.

1884.  J. T. Trowbridge, Farnell’s Folly, I. xiii. 141. The said library, so soundingly alluded to, was entirely imaginary.