Taciturnity

Tac`i*tur"ni*ty (?), n. [L. taciturnitas: cf. F. taciturnité.] Habilual silence, or reserve in speaking.

The cause of Addison's taciturnity was a natural diffidence in the company of strangers.
V. Knox.

The taciturnity and the short answers which gave so much offense.
Macaulay.