Undependable is a synonym of unreliable.
As adjectives the difference between unreliable and undependable
is that unreliable is not reliable while undependable is the opposite of dependable.
unreliable
English
Derived terms
* unreliable narrator
undependable
English
Usage notes
More undependable would often be expressed as less dependable and most undependable would often be least dependable.
Antonyms
*dependable
Synonyms
*unreliable