The Merriam-Webster Dictionary gives this:
consigliere
Main Entry: con·sig·li·e·re
Pronunciation: \kōn-(ˌ)sil-ˈye-re, -ˈyer-ē; kän-(ˌ)si-glē-ˈye-rā, -rē, -ˈyer\
Function: noun
Inflected Form(s): plural con·sig·li·e·ri \-rē\ also con·sig·li·e·res
Etymology: Italian, from consiglio advice, counsel, from Latin consilium — more at counsel
Date: 1615
: counselor, adviser <consigliere of a Mafia family>
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