Adjective: undependable ,ún-di'pen-du-bul
- Not worthy of reliance or trust
"don't rely on my undependable friend to do it for you";
- unreliable, flaky [informal], flakey [informal]
- Liable to be erroneous or misleading
"an undependable generalization";
- unreliable
See also: erratic, fallible, temperamental, uncertain, unsound, untrustworthy, untrusty
Antonym: dependable