undependable

1. Not worthy of reliance or trust (synset 300728305)
   "in the early 1950s computers were large and expensive and unreliable"; "an undependable assistant"
   also: untrustworthy, untrusty - not worthy of trust or belief
   similar to:

   • erratic, temperamental - likely to perform unpredictably
   • uncertain - not consistent or dependable
   • unsound - of e.g. advice
   same as: unreliable
2. Liable to be erroneous or misleading (synset 300967779)
   "an undependable generalization"
   similar to: fallible - likely to fail or make errors
   same as: unreliable

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