Quiesce \Qui*esce"\, v. i. [imp. & p. p. Quiesced; p. pr. & vb. n. Quiescing.]

[L. quiescere, akin to quies rest, quiet. See Quiet, a. & n.]

To be silent, as a letter; to have no sound. --M. Stuart.

Source: Webster's Revised Unabridged Dictionary (1913)