trusty

nouns

a convict who is considered trustworthy and granted special privileges
trusty
is a type of (narrower)
a person serving a sentence in a jail or prison
con, convict, inmate, yard bird, yardbird

adjectives

worthy of trust or belief
"a trustworthy report"; "an experienced and trustworthy traveling companion"
trustworthy, trusty
is derived from
trust
is derived from
trust
is derived from
trust
is derived from
trustiness