trusty
adj.describing something that you have used for a long time and can always depend on. It is often used for old but reliable tools or objects.
adj.reliable and faithful over a long period of time. Often used to describe inanimate objects or tools that have proven their utility through consistent performance.
“I took my trusty old umbrella because it looked like rain.”
“He pulled out his trusty pocketknife to open the package, just as he had done for twenty years.”
“While the newer models offered more features, the mechanic preferred his trusty set of manual wrenches for their tactile feedback and indestructible build.”
Typically used attributively before a noun; often carries a slightly affectionate or nostalgic tone.
“Your trusty electric fan could help more than you think - but only if you put it in the right place.”
From Middle English trusty, tristy, tresty, equivalent to trust + -y.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.