Quiescent
Quiescent , adjective
[Latin quiescens, -entis, present participle of quiescere: compare French quiescent. See Quiesce.]
1.
Being in a state of repose; at rest; still; not moving; as, a quiescent body or fluid.
2.
Not ruffed with passion; unagitated; not in action; not excited; quiet; dormant; resting.
In times of national security, the feeling of patriotism... is so quiescent that it seems hardly to exist.
3.
(Grammar) Not sounded; silent; as, y is quiescent in “day” and “say.”
Quiescent , noun
(Grammar) A silent letter. — M. Stuart