A trusted friend is someone who you can rely on and confide in. The term 'trusted friend' can be broken down into two words: PAL (3 letters) and ALTEREGO (8 letters). A PAL is someone who is a close friend, while an alter ego is a second self that a person creates to express different parts of their personality. Together, these two words form the phrase 'trusted friend, ' which describes someone who is both a close companion and a confidant.