Reticence is being reserved, quiet or reluctant.
An example of reticence is a person sitting in a corner not engaging with anyone at a dinner party.
the quality or state, or an instance, of being reticent; reserve
Origin of reticence; from French or L: French réticence ; from Classical Latin reticentia
(countable and uncountable, plural reticences)
From Latin reticentia, from reticÄ“re