The old well is a 'dependable' source of water. [=there is always water in the old well]
He's the team's most 'dependable' [='consistent'] player.
a 'dependable' [='reliable'] old car
(..) ...but I will lose the customer forever to Pizza Yurt. Look, you are my only hope, all right? You have to make it in time. Peter, you're a nice guy. But you're just not dependable. This is your last chance. You have to go blocks in / minutes or your ass is fired. Go! Hey, what, are you stupid? (..)2004 Spider-Man 2
(..) to their ideal monster... -( roars ) -( screaos ) to produce superior scream refined into clean, dependable energy. Every time you turn something on Monsters, Incorporated is there. I'm Monsters, Incorporated! (..)2001 Monsters, Inc.
(..) How's that? Maybe it's not new math at all. It could be old math. Something that looks at the problem numerically, and not theoretically - Math is always dependable. - For you it is. Euler's Method. - Euler's Method? - Yes. - That's ancient. (..)2016 Hidden Figures