diffidence

noun2

1. •
   The state of being diffident, timid or shy; reticence or self-effacement.

   • Without scruple—without apology—without much apparent diffidence, Mr. Elton, the lover of Harriet, was professing himself her lover. — 1815
2. •
   (no longer used) Mistrust, distrust, lack of confidence in someone or something.

   • [Charles, King of France]: We have been guided by thee hitherto, And of thy cunning had no diffidence: One sudden foil shall never breed distrust. — 1591