unreliable
un|re|li|able /'ʌnrɪl'aɪəbəl/
[ADJ]
If you describe a person, machine, or method as unreliable, you mean that you cannot trust them.
Diplomats can be a notoriously unreliable and misleading source of information...
He had an unreliable car.
≠ reliable
● unreliability [N-UNCOUNT]
...his lateness and unreliability.
[ADJ]
If you describe a person, machine, or method as unreliable, you mean that you cannot trust them.
Diplomats can be a notoriously unreliable and misleading source of information...
He had an unreliable car.
≠ reliable
● unreliability [N-UNCOUNT]
...his lateness and unreliability.