trusty
adj (-ier, -iest) (arch or joc 古或谑) trustworthy 可信任的; 可信赖的; 可靠的
mounted his trusty steed 骑上他那匹得力的马
my trusty old bicycle 我那忠心耿耿的自行车. n prisoner who is given special privilegesor responsibilities because of good behaviour 模范犯人（因表现好而获优待或担负责任的）.