People or things that are reliable can be trusted to work well or to behave in the way that you want them to. 可靠的
adjective [原级] 可靠的，可信赖的；真实可信的，确凿的；（汽车、设备、系统等）耐用的，性能稳定的
She was efficient and reliable. 她既能干又可靠。
noun [抽象名词] 可靠的人（或物）
She has been reliable and punctual. 她一直可靠守时。
