duenna

noun

Etymology: From Old Spanish duenna or dueña, from Vulgar Latin donna, from Latin domina (“Lady”). Doublet of dame.

1. A chaperon of a young lady, usually an older woman.

   “'Madam, I have a secret to tell you.' Now the very word secret is enough to rouse any one's curiosity; and, giving a quick glance round to see if her duennas were on the alert, she prepared to listen, and I saw that her eye had caught sight of the letter.”

   “Then he placed her in a house and shut her up in a chamber, appointing ten old women as duennas to guard her, and forbade her to go forth to the Seven Palaces.”

2. A governess or nanny.