1: inclined to be silent or uncommunicative in speech, reserved. Used in a sentence: “Her husband is by nature a reticent person, and she resigned herself to that fact long ago.”
2: restrained in expression, presentation, or appearance. Used in a sentence: ”The room has an aspect of reticent dignity.” — A. N. Whitehead
3: reluctant. Used in a sentence: “… his friends and associates are conspicuously reticent to discuss him in public.”-Martin Flanagan, Manchester Guardian Weekly, Dec. 29, 1991.
Etymology of RETICENT
Latin reticent- reticens, present participle of reticēre to keep silent, from re- + tacēre to be silent
Source cited: http://www.merriam-webster.com/dictionary/reticent