You searched for: “tamquam alter idem”
tamquam alter idem.
Translation: "As if a second self."
Cicero used the expression, "as if a second self", to describe a completely trustworthy friend; such as, an alter ego, "other I" or alter idem, "another self" both of which are considered to be one's inseparable friend.
This entry is located in the following units: alter- (page 3) Latin Proverbs, Mottoes, Phrases, and Words: Group T (page 1)