Webster’s Revised Unabridged Dictionary · 1913
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.