Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Adjective: undependable  ,ún-di'pen-du-bul
  1. Liable to be erroneous or misleading
    "an undependable generalization";
    - unreliable
  2. Not worthy of reliance or trust
    "an undependable assistant";
    - unreliable, flakey [informal], flaky [informal]

See also: erratic, fallible, temperamental, uncertain, unsound, untrustworthy, untrusty

Antonym: reliable