the.com/durability

means The quality of holding up over time without breaking, wearing out, or falling apart.

from From Latin 'durare,' meaning 'to last' or 'to harden,' which also gives us 'endure' and 'duration.' The root traces back to 'durus,' meaning 'hard' — the same hardness you'd feel knocking on stone. So something durable is, at its linguistic core, something that has been hardened against time, even if in practice it's just a toaster that refuses to die.