unreliable
US /ˌʌn.rɪˈlaɪə.bəl/
UK /ˌʌn.rɪˈlaɪə.bəl/
1.
not able to be relied upon; not dependable
:
•
The old car was very unreliable, often breaking down.
•
His information is often unreliable, so double-check everything.
not able to be relied upon; not dependable