unreliable

Meanings

1. 1
   adj

   not worthy of reliance or trust

   in the early 1950s computers were large and expensive and unreliable

2. 2
   adj

   Not reliable.

   Tell one another whether any one of you has ever heard me discuss such questions briefly or at length; and then you will realize that the other popular reports about me are equally unreliable.

3. 3
   noun

   One who or that which cannot be relied upon.

   His employment by the leading papers in Chicago was intermittent, as he was classed among the unreliables. One could never tell when he was going to get drunk.

4. 4
   adj

   liable to be erroneous or misleading

5. 5
   adj

   lacking a sense of responsibility

6. 6
   adj

   dangerously unstable and unpredictable

Etymology

From un- + reliable.