Unreliable
(adjective)
- Not able to be trusted or relied upon.
- Inconsistent or undependable.
Origin:
Late 19th century: from un-1 (expressing negation) + reliable.
Examples:
- The car was deemed unreliable due to its frequent breakdowns.
- The witness was considered unreliable due to inconsistencies in their testimony.
- His promises were unreliable and often not kept.
- The source of information was unreliable and therefore not used.
- The network was deemed unreliable due to frequent outages.