FromMiddle Englishtrusty,tristy,tresty, equivalent totrust +-y.
trusty (comparativetrustier,superlativetrustiest)
- Reliable ortrustworthy.
She's been using the sametrusty sewing machine since she started out, thirty long years ago.
trusty (pluraltrusties)
- Atrusted person, especially aprisoner who has beengrantedspecialprivileges.
1941, James Howell Street,In my father's house:We usta have a rule that if atrusty shot an escaping convict, then the trusty would go free.
1953,Raymond Chandler,The Long Goodbye, Penguin, published2010, page58:The cell block is clean and doesn't smell of disinfectant. Thetrusties do all the work. The supply of trusties is always ample.