1) Anecdotal 2) Changeable 3) Deceitful 4) Devious 5) Dishonest 6) Disloyal 7) Fallible 8) Not reliable 9) Not to be relied on 10) Not to be trusted 11) Not trustworthy 12) Questionable 13) Shady 14) Shifty 15) Treacherous 16) Undependable 17) Unstable 18) Varying 1) Changeable 2) Dangerous 3) Erratic 4) Error prone 5) Fallible 6) Impulsive 7) Irresponsible 8) Misleading 9) Risky 10) Subjective 11) Treacherous 12) Undependable 13) Unpredictable 14) Untrustworthy 15) Untrusty 16) Untruthful 17) Variable 
• (a.) Not reliable; untrustworthy. See Reliable.
[adj] - lacking a sense of responsibility 2. [adj] - not worthy of reliance or trust
unreliable 1. Lacking a sense of responsibility. 2. Not worthy of reliance or trust. 3. Dangerously unstable and unpredictable. 4. Not to be trusted. 5. Liable to be erroneous or misleading.
undependable adjective not worthy of reliance or trust; `in the early 1950s computers were large and expensive and unreliable`; `an undependable assistant`
not reliable; not to be relied or depended on.