unreliable
Translation
unreliable, undependable, untrustworthy
Examples
The weather forecast is often unreliable.
The weather forecast is often unreliable.
He is an unreliable witness.
He is an unreliable witness.
Grammar Patterns
((sb./sth.)) is unreliable (sb./sth.) cannot be trusted or believed The weather forecast is often unreliable.
Similar Words
Synonyms: undependable, untrustworthy; Antonyms: reliable, dependable
Etymology
From the prefix 'un-' (not) and 'reliable' (able to be relied upon).
Memory Tips
If someone is 'unreliable', you can't 'rely' on them. The prefix 'un-' negates the meaning.