trust·y
adjective/ˈtrʌsti/
/ˈtrʌsti/
[only before noun] (old use or humorous)- that you have had a long time and have always been able to rely on
（长期以来）可信任的，可信赖的；忠实的 - a trusty friend
忠实的朋友 - She spent years touring Europe with her trusty old camera.
她带着她那架忠心耿耿的照相机在欧洲周游多年。
- a trusty friend