Reticence

Part of speech: noun (n.)

1. The quality or state of being reticent, or keeping silence; the state of holding one's tonque; refraining to speak of that which is suggested; uncommunicativeness. Such fine reserve and noble reticence. Tennyson.

2. A figure by which a person really speaks of a thing while he makes a show as if he would say nothingon the subject.