( feminine also con·fi·dante ) /ˈkɒnfɪdænt; ˌkɒnfɪˈdɑːnt; NAmE ˈkɑːnfɪdænt/ noun
a person that you trust and who you talk to about private or secret things :
a close / trusted confidant of the President
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WORD ORIGIN
mid 17th cent.: alteration of confident (as a noun in the same sense in the early 17th cent.), probably to represent the pronunciation of French confidente having full trust.