confident

adj

1. Very sure of something; positive.

   “I'm pretty confident that she's not lying, she's acting normally.”

   “He was confident of success.”

2. Self-assured, self-reliant, sure of oneself.
3. (derogatory, obsolete)Forward, impudent.

   “I was rated as the most confident ruffian, for daring to approach her room at that hour of night.”

noun

1. (alt-of, obsolete)Obsolete form of confidant.

   “He managed this consultation with exceeding secrecy, admitting only four or five of his confidents, on whom he most relied”

   “a certain Lawyer , a great Confident of the Rebels”